Pool Chemicals in Darwin
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Darwin Pool Chemicals
20+
Years
Experience.
Keeping your pool water clean and safe doesn’t have to be complicated, but using the right chemicals, in the right amounts, makes all the difference. In Darwin’s hot and humid climate, pool water is prone to rapid algae growth, pH imbalances, and bacteria if not properly maintained. That’s why Friendly Pool & Spa Care in Darwin offer a full range of quality pool chemicals designed to keep your water sparkling and swim-ready.
From chlorine and stabilisers to pH balancers, algaecides, and specialty treatments, we help you take the guesswork out of water care. Whether you’re after a quick top-up or need help diagnosing an ongoing issue, our team is here to guide you with expert advice and reliable products. Our in-store water testing can pinpoint exactly what your pool needs, saving you time and avoiding overuse of chemicals. Call (08) 8985 6313 or stop by to get the right solution for your pool.
More than
20 years
keeping pools crystal clear
Chemicals
Darwin's No.1 pool shop for cleaning, servicing and maintaining your pool
Cal Chlor CLC 700
BioGuard Cal Chlor CLC 700 is a granular calcium hypochlorite product that can be used for regular sanitation and oxidation.
- 700g/kg available chlorine.
- Does not contain Cyanuric Acid.
- Effective pool sanitiser and oxidiser.
- Inexpensive.
- Available in 10kg pails for commercial applications.
- Suitable sanitiser when stabiliser is not permitted
Super Clear Clarifying Tabs
BioGuard Super Clear Clarifying Tabs are 60g tablets containing a propriety clarifier Poly A 2000 which aids in the removal of both organic and inorganic wastes by gathering together particles that can cause dull and cloudy water.
- Cationic polymeric flocculant.
- Unique 60g clarifying tablets.
- Built-in water enhancing agents.
- Weekly skimmer application.
- Compatible with all types of filtration systems.
- Non-toxic.
- Classified as Non-Dangerous Good.
- Promotes excellent water clarity.
- Enhances filtration.
- Improves sanitiser effectiveness
Power Floc Maxi
BioGuard Power Floc Maxi is a concentrated flocculant that coagulates and settles suspended particles to the bottom of the pool for easy removal with a vacuum.
- Non-alum, polymeric cationic coagulant.
- Concentrated formulation.
- Settles suspended particles to the bottom for removal by vacuum.
- Up to three times faster than many flocculants on the market.
- Suitable for all pool types.
- The greater the amount of debris in the water, the faster it works.
- Classified as Non-Dangerous Good.
- Makes water clear and sparkling.
- Excellent problem solver for very cloudy pools
Pool Tonic
BioLab Pool Tonic removes Phosphate and at least 10 other unwanted contaminants for a stress-free pool.
- Removes phosphate, a food source for algae, and other unwanted contaminants from pool water.
- Clarifies pool water.
- Binds particles that are too small for normal filtration.
- Classified as Non-Dangerous Good.
- Removes skin oils, pollution dirt, pet dander, pollen, greases, dust, lotions and hair-care
- products.
- Eco-friendly product, made with natural ingredients.
- Better for the environment
Pool Complete
BioGuard Pool Complete is an easy weekly maintenance routine which keeps water amazingly clear, prevents waterline build up and removes phosphates.
- 3 in 1 intensity formula that results in a visually stunning swimming pool
- Formulated to efficiently attract unwanted particles so the filter can easily remove
- Easy to use weekly maintenance for sparkling results
- Crystal clear water
- Prevents water line build-up
- Removes phosphates – food source for algae and other unwanted contaminant
Polysheen Plus
BioGuard Polysheen Plus is a highly concentrated product that combines small particles into larger ones, making it much easier for the filter to remove debris and insoluble compounds.
- Specially formulated liquid polymer blend.
- Contains no alum.
- Does not affect pH.
- Highly concentrated, yet does not require dilution.
- Safe for all pool and filter types.
- Classified as Non-Dangerous Good.
- Water is restored to sparkling.
- Easy to use.
- Excellent as a problem solver for cloudy pools where chlorine demand is not an issue
Phos Kill
BioGuard Phos Kill will remove phosphates (a major food source for algae) from pool water, preventing algae growth. Using this product makes pool sanitation more efficient against green pools and can reduce chlorine consumption.
- 133g/L Lanthaum Glycolate Hexahydrate.
- Prevents algae growth by removing phosphates, a major food source.
- Negligible effect on water balance.
- Useful for pools exposed to phosphate rich environments, such as swimming pets, birds,
- heavy rain, garden beds, floods, dust storms, areas with many trees, country areas.
- Classified as Non-Dangerous Good.
- Promotes healthy, sparkling pool water for safe swimming conditions.
- Saves money by reducing chlorine consumption.
- Pool sanitisation becomes more efficient against green pools.
- Can be used as maintenance, preventative or problem solver
Chem Out
BioGuard Chem Out is a granular neutraliser that reduces excessive chlorine or bromine.
- 1000g/kg sodium sulphite.
- Reduces pool down time due to excessive chlorine and bromine residuals.
- Does not affect pH.
- For use in all types of pools.
- Allows swimmers to re-enter pool faster.
- Excellent problem solver in pools with high sanitiser levels
Salt Cell Cleaner
BioGuard Salt Cell Cleaner is designed to effectively clean chlorinator cells of scale deposits and other material without damaging the cell.
- 200g/L hydrochloric acid.
- Formulated for salt cells.
- Removes scale build-up from salt cells.
- Fast acting
- Cell efficiency improves, prolonging cell life and reduces running costs.
- Won’t damage cells unlike straight hydrochloric acid
Filter Brite
BioGuard Filter Brite restores the efficiency of pool water filters by removing scale and rust deposits, greases, oils and organic wastes, whilst sanitising the filter media or cartridge.
- Cleans oil and grease from filters of all types.
- Removes scale and rust deposits.
- Sanitises filter.
- Improves filtration and circulation to help keep water clear.
- Lengthens life of the filter.
- Reduces maintenance costs.
- Protects swimmer from bacteria
Spa Velvet
BioGuard SPA Velvet is a multifunctional granular product that enhances water comfort, increases water clarity, and improves the performance of other products.
- 937g/kg boric acid.
- Increases mineral solubilities.
- Rose fragrance.
- Compatible with all types of sanitisers.
- Compatible with all spas surfaces.
- Classified as Non-Dangerous Good.
- Enhances water comfort and clarity.
- Nourishes skin and hair.
- Reduces the incidence of skin and eye irritation.
- Improves chemical efficiencies.
- Protects metal surfaces and equipment, including the heater
Symmetry
BioGuard SPA Symmetry can be used in automatic feeders or floaters for sanitizing spas. When used as directed, its slow, consistent dissolving rate provides a constant and reliable sanitiser level at all times.
- 650g/kg available Bromine and 280g/kg available Chlorine present as Bromochlorodimethyhydantoin (BCDMH).
- Effective over a wider pH range than chlorine alone.
- Less odour and slower dissolving than chlorine tablets.
- Chlorine content of tablet serves to regenerate bromine.
- Controls bacteria and algae in spas.
- Ideal for indoor spas, and pools with attached spas because of reduced odours.
- Makes optimum use of sanitising ability
Spa Sanitiser
BioGuard SPA Sanitiser is 100% soluble, stabilised sanitiser to control bacteria and algae in spas.
- 560g/kg available chlorine, present as sodium dichloroisocyanurate dihydrate.
- Totally soluble and fast dissolving granules.
- Formulated to have minimal impact on water balance and will not cloud water.
- Controls all algae and bacteria.
- Destroys organic wastes.
- Will not cloud.
- No residue.
- Easy to use and no pre-dissolving required.
- Stabilised to increase the longevity of chlorine
Shield
BioGuard SPA Shield raises calcium hardness to help prevent corrosion of equipment and etching of surfaces.
- Minimum 740g/kg calcium chloride.
- Increases calcium.
- Helps prevent corrosion of equipment.
- Helps prevent etching.
- Classified as Non-Dangerous Good.
- Protects spa surface and equipment.
- Assists in maintaining calcium hardness levels
Performance Up
BioGuard SPA Performance Up raises Total Alkalinity to help prevent equipment corrosion and surface damage and helps control the pH.
- 1000g/kg sodium hydrogen carbonate.
- Raises Total Alkalinity.
- Reduces pH fluctuation.
- For all spa types.
- Protects the pH from being influenced by factors such as rain, bather load and other chemical
- applications.
- Prevents corrosion of equipment.
- Protects the spa surface
Foam Go
BioGuard SPA Foam Go eliminates foaming in spas and pools with attached spas.
- Concentrated aqueous silicone emulsion.
- Quickly eliminates and prevents foaming.
- Does not affect pH.
- For use with all sanitiser types.
- Classified as Non-Dangerous Good.
- Eliminates unsightly foam instantly.
- Ideal for pools with attached spas.
- Can be used to treat foaming in ornamental fountains.
- Suitable for treating overdoses of algaecides or vandalised pools and spas
Crystal Clear
BioGuard SPA Crystal Clear is specifically designed for clarifying cloudy water in spas.
- Specially formulated liquid polymer blend.
- Contains no alum.
- Makes small non-filterable particles big enough to be removed by the filter.
- Improves filter efficiency.
- Does not affect pH and water balance.
- Classified as Non-Dangerous Good.
- Makes water clear and sparkling.
- Concentrated formula saves time and money.
- Easy to use
Comfort Up
BioGuard SPA Comfort Up raises pH to help prevent equipment corrosion, surface damage, and skin and eye irritation.
- 1000g/kg sodium carbonate.
- Raises pH.
- For all spa types.
- Classified as Non-Dangerous Good.
- Prevents corrosion of equipment.
- Protects spa surface.
- Reduces potential of skin and eye irritation
Armour
BioGuard SPA Armour is fast-dissolving, totally soluble granular product that can be used as a sanitiser and an oxidiser in outdoor spas.
- 530g/kg available chlorine, present as Sodium dichloroisocyanurate.
- 150g/kg Sodium bromide.
- One-step, dual-purpose product.
- Totally soluble and fast dissolving.
- Chlorine content of product serves to regenerate bromine.
- Controls bacteria.
- As it can be used as a sanitiser and an oxidiser there is no need for two products.
- May be added directly to spa with no pre-dissolving.
- Destroys organic wastes.
- Keeps spa sanitised and clear
Swim Tabs
BioGuard Swim Tabs are stabilised 200 gram trichlor tablets that can be used in automatic feeders and some floaters for constant chlorination.
- 900g/kg available chlorine.
- Totally soluble.
- Slow-dissolving and long lasting.
- Does not cloud pool water.
- Slow-dissolving for steady release of chlorinating product
Swim Clear
BioGuard Swim Clear is a completely soluble, stabilised granular chlorinating product suitable for both regular sanitation and shocking.
- 560g/kg available chlorine.
- Completely and instantly soluble, leaving no residual.
- Will not cloud water.
- Excellent for sanitising small above ground pools.
- Concentrated so you use less.
- Minimal impact on water balance, saving you money.
- 970g/kg sodium dichloroisocyanurate dihydrate.
- 560g/kg available chlorine.
- Classified as Non-Dangerous Good.
Smarter Sticks
BioGuard® Smarter Sticks are stabilized sticks containing SilkGuard® to protect pools against corrosion and staining. Also features SunShield® to prevent chlorine breakdown from the sun’s damaging UV rays, and SmartGuard technology for a controlled dissolving rate when the pump is off. Designed for pool owners who have little time to take care of their pool, they are slow dissolving and tightly compressed meaning they last twice as long as ordinary trichlor chlorinating sticks.
- 855g/kg available chlorine.
- Controlled-dissolving sticks.
- SilkGuard technology for corrosion and staining prevention.
- SunShield for protection against UV rays.
- SmartGuard technology for chlorine protection.
- Once-a-week maintenance.
- Ensures sparkling clear pool water.
- Ensure year-round healthy water.
- Kills bacteria.
- Prevents corrosion and staining.
- Dose and forget.
- Reduction of scale formation
Power Chlor
BioGuard Power Chlor is a revolutionary patented product. Each co-compacted granule contains trichlor for killing algae and bacteria, chlorine-tolerant clarifiers for keeping water crystal clear, and water-enhancing agents to provide a silky smooth feel to the water whilst reducing skin and eye irritation.
- 660g/kg available chlorine.
- Unique co-compacted granular product.
- Skimmer-fed application.
- Improves filter efficiency.
- Less skin and eye irritation than many other chlorinating products.
- Easy to use with no need to pre-dissolve.
- Concentrated so you use less.
- Minimal impact on water balance, saving you money.
- 727g/kg trichloroisocyanuric acid.
Pacific Blue Power Tabs
BioGuard® Pacific Blue Power Tabs are unique patented 160g pool tablets that provide optimum sanitation for pools, as well as having multifunctional capabilities to assist in buffering and clarifying pool water.
- 650g/kg available chlorine.
- Totally soluble, multifunctional 160g tablet.
- Built-in chlorine-tolerant clarifiers and water-enhancing agents.
- Can be used in skimmers, floaters or feeders.
- Ensures sparkling clear pool water.
- Save money as up to 20% less product required than comparable sanitisers.
- Less skin and eye irritation than many chlorinating products.
- Easy to use.
- Minimal impact on water balance, saving you money.
- Consistent chlorine levels for better protection.
- 723g/kg trichloroisocyanuric acid.
- 650g/kg available chlorine
Optimiser
BioGuard Optimiser is a multifunctional granular product that enhances water comfort, increases water clarity, improves the performance of other products and suppresses the growth of algae.
- 1000g/kg boric acid.
- Increases water clarity.
- Improves performance of all BioGuard products.
- For use in all pool types.
- Stable in sunlight and does not evaporate.
- Classified as Non-Dangerous Good.
- Provides sparkling, silky water.
- Conditions the water to be more comfortable for swimmers.
- Less skin and eye irritation.
- Suppresses the growth of algae.
- Gets better results from any sanitiser type, so saves time and money.
- Enhances water comfort
Burn Out Extreme
Burn Out Extreme’s multifunctional granules provide a convenient and economical means for shocking swimming pools and for treating pools with chlorine demand and/or algae problems.
- 660g/kg available chlorine.
- One 600g bag treats a 50,000 litre pool.
- Totally soluble, multifunctional granular product.
- Built-in clarifiers and water-enhancing agents.
- Skimmer-fed one bag application.
- Ideal for solving chlorine demand issues.
- Ensures sparkling clear pool water.
- Improves filter efficiency.
- Less skin and eye irritation than many chlorinating products.
- No need to pre-dissolve.
- Easy to use
Stabiliser
BioGuard Stabiliser is a granular cyanuric acid that prevents chlorine loss due to sunlight.
- 1000g/kg cyanuric acid (CYA).
- Prevents chlorine loss due to sunlight.
- For use with chlorine systems only (not suitable for use with brominating tablets).
- Classified as Non-Dangerous Good.
- Reduces chlorine consumption.
- Reduces maintenance costs.
- Ideal for outdoor swimming pools
Oxysheen
BioGuard Oxysheen is a chlorine-free, stabiliser-free oxidiser treatment for swimming
pools. It is easy to use, fast dissolving and swimming can resume one hour after treatment. Regular use will help maintain sparkling clear water by destroying irritating chloramines and soluble organic wastes that cause dull cloudy water.
- 42.8% Potassium Peroxymonopersulfate.
- Chlorine-free and stabiliser-free oxidiser.
- Totally soluble.
- Will not increase Cyanuric Acid levels.
- Fast acting easy to use.
- Regular use helps maintain sparkling clear water.
- Destroys organic wastes and eliminates odours.
- No need to pre-dissolve.
- Allows swimmers back into the water after an hour
Lo'N'Slo
BioGuard Lo’N’Slo is a granular product designed to decrease Total Alkalinity and pH levels in pool water to prevent cloudy water, scale formation, high acid demand and poor chlorine efficiency.
- 1000g/kg sodium hydrogen sulphate.
- Lowers Total Alkalinity and pH.
- For all pool types.
- Classified as Non-Dangerous Good.
- Micro granule that breaks water surface tension and sinks before dissolving.
- Prevents corrosion of equipment.
- Prevents etching of concrete and grout, and wrinkling of liners.
- Reduces the risk of scale formation.
- Easier to use than liquid acid (hydrochloric acid, muriatic acid).
Balance Pak 300
BioGuard Balance Pak 300 is a soluble calcium hardness increaser.
- 740g/kg calcium chloride.
- Granular formulation allows for faster dissolving.
- Less likely to cloud the water on application.
- No pre-dissolving.
- Classified as Non-Dangerous Good.
- Prevents etching and roughness of plaster finishes from low calcium.
- Prevents corrosion of equipment and metal fittings.
Balance Pak 200
BioGuard Balance Pak 200 is a soluble pH increaser that is suitable for all pool types.
- 1000g/kg sodium carbonate (dense soda ash).
- Raises pH.
- For all pool types.
- Classified as Non-Dangerous Good.
- Prevents corrosion of equipment and metal fittings.
- Prevents etching of concrete and grout, and wrinkling of liners.
- Prevents eye irritation due to low pH.
Balance Pak 100
BioGuard Balance Pak 100 is a soluble powder that eliminates pH bounce and raises
Total Alkalinity.
- 1000g/kg sodium hydrogen carbonate (sodium bicarbonate).
- Raises Total Alkalinity.
- For all pool types.
- Classified as Non-Dangerous Good.
- Protects the pH from being influenced by factors such as rain, swimmer load and other
- chemical application.
- Prevents corrosion of equipment and metal fittings.
Polygard Concentrate
BioGuard Polygard Concentrate is a non-foaming polyquat algae preventative and algaecide that is excellent for use in pools with attached spas, fountains, or jetted returns.
- 600g/L polixetonium salts.
- Non-foaming.
- Metal free.
- Effective on all common algae types.
- Works with chlorine or bromine.
- Excellent for use in pools with attached spas or fountains.
- Negligible effect on water balance
MSA Extreme
BioGuard MSA Extreme kills all types of algae in swimming pools. MSA Extreme contains a patented chelate that prevents staining that commonly occurs with other copper-based algaecides. MSA Extreme is formulated for use in chlorine or bromine sanitised swimming pools of all surface and filter types. It does not affect pH.
- 40g/L copper active present as copper polyacrylate molecule.
- Unique non-staining formula.
- Withstands up to 50 ppm of chlorine.
- Contains metal chelating products.
- Built in water clarifiers.
- Effective against all common and mutant strains of algae.
- Long lasting algae prevention.
- Will not stain pool surfaces.
- Results can be seen in 24 hours.
- Multi functional formula clears water
AlgiGuard
AlgiGuard is a highly effective quat-based algaecide that works well with chlorinating products to prevent a wide variety of algae. It also lowers water surface tension to help repel ducks and insects.
- 400g/L benzalkonium chloride.
- Powerful wetting agent.
- Stable in sunlight and will not evaporate.
- Prevents wide spectrum of algae growth.
- Also effective as a duck deterrent and floating/swimming insect killer.
- Negligible effect on water balance
Algi Destroyer
Algi Destroyer is an effective destroyer of stubborn algae infestations, especially green and black spot algae. By combining two active ingredients into one formula, a double action attack eradicates algae swiftly and successfully. Being a non-metal algaecide, Algi Destroyer is ideal for use with vinyl-lined pools or fiberglass pools.
- 320g/L polixetonium salts.
- 54 g/L Simazine.
- Non-foaming.
- Double action attack on stubborn algae.
- Metal free algaecide.
- Especially effective against green and black spot algae.
- Suitable for all pool surfaces
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Choosing Chemicals for Territory Conditions
In a tropical climate like Darwin’s, your pool’s chemical balance can change fast—especially after rain, intense heat, or heavy use. That’s why it’s important to stay on top of your chemical routine with the right products and proper testing. Chlorine is the main disinfectant, but it needs the support of other balancing agents to work effectively. Stabiliser helps prevent chlorine loss in the sun, while pH adjusters and alkalinity increasers keep water from becoming corrosive or cloudy.
We also carry clarifiers, flocculants, calcium hardeners, and algaecides for specific needs. If you're managing a saltwater pool, we’ll help you maintain the right salinity and sanitation levels without overdoing it. Whether you’re new to pool ownership or just tired of wasting money on products that don’t work, we can help simplify your routine. Visit our store or get in touch to get tailored advice and the right mix of chemicals for your pool.
What chemicals do I need to maintain a pool?
Maintaining a healthy pool usually requires chlorine (or a chlorine alternative), pH increaser or decreaser, alkalinity adjusters, calcium hardness increaser, stabiliser (cyanuric acid), and sometimes algaecides or clarifiers. Each chemical plays a specific role: chlorine sanitises, pH and alkalinity maintain water balance, and calcium prevents corrosion.
Testing your water regularly is key to knowing which chemicals to add and in what amounts. Overuse or underuse can lead to cloudy water, damaged equipment, or skin irritation.
How often should I add chemicals to my pool?
Most residential pools need chemical adjustments weekly, though this can vary depending on weather, usage, and whether your pool is saltwater or chlorinated. During Darwin’s wet or hot season, you may need to test and adjust chemicals more frequently, sometimes several times per week.
Regular testing ensures chlorine remains effective and pH stays within the safe range of 7.2 to 7.6. Automated systems like chlorinators can help manage daily sanitising, but manual checks are still important.
Can you mix different pool chemicals together?
No—it is never safe to mix different pool chemicals directly, especially in their concentrated form. Doing so can cause dangerous chemical reactions, including toxic gas release or combustion. Always add chemicals separately to the water and allow one to fully circulate before adding another.
Follow dosing instructions carefully and use proper protective equipment when handling concentrated products. Store all chemicals in a dry, ventilated area away from heat or open flames.








































