Seachem pH Alert
The seachem pH alert is a small, colour-changing sensor that gives you continuous pH monitoring inside your freshwater aquarium. It shows changes instantly and makes it easy to keep your water stable without test strips or liquid kits.
What it does
Continuously monitors pH in freshwater tanks
Uses a clear colour scale you can read at a glance
Shows changes instantly, helping you spot problems early
Lasts about 3 to 6 months, depending on water conditions
No batteries, calibration, or maintenance needed
Why it’s useful
Helps maintain stable pH for healthy fish and plants
Great for community tanks, planted tanks, shrimp tanks, and betta tanks
Ideal for beginners and convenient for experienced aquarists
More economical than regular test strips
Slim design that sits neatly inside the aquarium
How to use
Rinse the pH alert with aquarium water
Place it inside the tank where it is easy to see
Check the colour against the built-in scale any time
Replace when the sensor becomes slow to respond
Ideal for
Freshwater aquariums
New setups needing stability checks
Planted tanks and shrimp tanks
Nano tanks and betta tanks
Quarantine and breeding tanks
Simple, clear pH monitoring
The seachem pH alert offers quick, everyday visibility of your tank’s pH, helping you keep your aquarium stable and your fish comfortable.
Seachem pH Alert
Monitor your aquarium’s pH continuously with the reliable Seachem Seachem pH Alert. This easy-to-use in-tank sensor provides constant pH monitoring for freshwater aquariums without the need for test kits or strips. The colour-changing sensor instantly shows your pH range, helping you quickly spot dangerous changes and maintain a stable, healthy environment for your fish.
Key Features
Continuous pH monitoring inside the aquarium
Clear colour indicator showing pH levels
Designed for freshwater aquariums
No test kits or chemicals required
Easy suction cup mounting
Long-lasting sensor (up to 1 year)
Benefits
✅ Provides constant pH monitoring without daily testing✅ Helps detect sudden pH swings that stress fish✅ Saves money on disposable test kits✅ Quick colour display makes readings easy for beginners✅ Helps maintain a stable and healthy aquarium environment
Instructions for Use
Remove the protective film from the sensor.
Attach the sensor inside the aquarium using the suction cup.
Allow the unit to adjust in the water for a short period.
Compare the colour of the sensor with the pH chart on the device.
Take corrective action if the pH moves outside the safe range for your fish.
Seachem PhosBond 100 ml–1 L
Description
Seachem PhosBond is a high‑capacity phosphate remover designed to rapidly reduce phosphate and silicate levels in both freshwater and marine aquariums. It combines activated alumina and iron oxide to effectively adsorb phosphate from water, helping to control algae growth and improve overall water quality. PhosBond works quickly and efficiently, making it ideal for aquariums where nutrient control is critical for a healthy aquatic environment.
Key Features
High‑capacity phosphate removal media
Combines activated alumina and iron oxide for effective adsorption
Reduces both phosphate and silicate levels
Suitable for freshwater and marine aquariums
Available in sizes from 100 ml to 1 L
Can be used in media bags, reactors, or filter chambers
Benefits
Helps control algae by lowering phosphate levels
Improves water clarity and overall aquarium appearance
Supports a healthier aquatic environment
Works efficiently in both marine and freshwater systems
Versatile media for different filtration setups
Usage
Rinse lightly before first use to remove dust
Place PhosBond in a filter media bag, reactor, or media tray
Position media in a high‑flow area for optimal performance
Replace media when phosphate levels begin to rise again
Monitor phosphate levels to determine media service life
Use in combination with mechanical filtration for best results
Seachem PhosFiltrum
Seachem PhosFiltrum is a highly effective phosphate-removal media designed to help control phosphate levels in aquariums. By reducing excess phosphates, it helps prevent unwanted algae growth and supports clearer, healthier water conditions.
PhosFiltrum works quickly and safely, making it ideal for both freshwater and marine systems. It is especially useful in heavily stocked tanks or aquariums experiencing persistent algae issues caused by elevated phosphate levels.
Key Features:
Effectively removes phosphates from aquarium water
Helps reduce algae growth
Improves overall water quality and clarity
Safe for freshwater and marine aquariums
Easy to use in filter media bags or reactors
Suitable For:
Freshwater aquariums
Marine and reef aquariums
Algae control
Phosphate management
Available Sizes:
50g
160g
Seachem PhosFiltrum is a reliable solution for maintaining low phosphate levels and creating a cleaner, more balanced aquarium environment.
Seachem PhosGuard 100 ml – 2 L
Description
Seachem PhosGuard is a high‑performance phosphate and silicate remover for both freshwater and marine aquariums. Its spherical, highly porous alumina‑oxide media binds phosphate and silicate irreversibly, helping to control nutrient levels that fuel algae growth and reduce water clarity. PhosGuard works rapidly and can be used in a variety of filtration systems to support cleaner, healthier water conditions.
Key Features
Rapidly removes phosphate and silicate from aquarium water
Spherical bead‑shaped media for optimal water flow
Irreversible binding — does not release nutrients back into water
Effective in both freshwater and marine systems
Available in sizes from 100 ml up to 2 L
Ideal for use with filter bags, media chambers, or high‑flow areas
Benefits
Helps control algae by lowering phosphate and silicate levels
Improves water clarity and overall tank appearance
Supports healthier aquatic environment for fish and invertebrates
Easy to integrate into existing filtration setups
Can be dried and reused until fully exhausted
Usage
Rinse PhosGuard lightly before use to remove dust
Pre‑wet media by adding to twice its volume of freshwater, then rinse
Place in a filter media bag, media chamber, or canister filter in a high‑flow area
Use ~85 ml per 200 L saltwater or 400 L freshwater initially
Leave media in place for around 4 days, then test phosphate/silicate levels
Replace media when phosphate begins to rise again
Avoid overdosing in sensitive or phosphate‑buffered freshwater tanks
Seachem PhosNet (50g)
Seachem PhosNet is a high-capacity phosphate and silicate remover designed for both freshwater and marine aquariums. It rapidly and effectively reduces phosphate levels, helping to prevent nuisance algae growth and improve overall water clarity.
PhosNet is ideal for use in filter media bags or reactors and works quickly without releasing harmful substances back into the aquarium when exhausted.
Features & Benefits:
Rapidly removes phosphate and silicate
Helps control and prevent nuisance algae
Improves water clarity and overall water quality
Suitable for freshwater and marine aquariums
High-capacity, fast-acting media
Ideal for use in filter bags or reactors
Trusted quality by Seachem
Available Size:
PhosNet – 50g
Safe for all aquarium inhabitants when used as directed. Rinse before use. Monitor phosphate levels regularly and replace media as needed.
Seachem PhosNet 125g–250g
Description
Seachem PhosNet is a high‑capacity granular ferric oxide (GFO) filtration media designed to rapidly remove phosphates and silicates from both freshwater and marine aquariums. Its highly porous structure and large surface area allow it to bind nutrients more effectively than many competing products, helping to maintain crystal‑clear water and reduce algae growth without releasing bound nutrients back into the aquarium.
Key Features
High‑capacity granular ferric oxide (GFO) media
Rapidly removes phosphates and silicates
High porosity and large surface area for efficient binding
Less dust than many competing GFO products
Safe for use in freshwater and marine aquariums
Available in 125 g and 250 g sizes
Benefits
Helps control algae by lowering nutrient levels
Improves water clarity and overall aquarium appearance
Effective nutrient control in both reef and freshwater systems
Easier to handle with reduced dust compared to some media
Long‑lasting media until phosphate/silicate levels rise again
Usage
Rinse PhosNet lightly before use to remove dust
Place in a filter media bag, canister filter, media chamber, or high‑flow area
Use approximately 50 g per 200 L saltwater or 400 L freshwater initially
Leave in place for about 4 days, then test phosphate/silicate levels
Replace media when nutrient levels begin to climb again
Avoid overcrowding media to prevent reduced flow and efficienc
Seachem Plant Pack Enhancer
Seachem Plant Pack Enhancer is a convenient all-in-one fertilizer starter pack designed for freshwater planted aquariums. It provides essential macro and micronutrients required for healthy plant growth, vibrant coloration, and strong root and leaf development.
This pack is ideal for beginner to intermediate planted tank keepers and is perfectly suited for low to moderate light aquariums. It helps establish a balanced fertilization routine without the complexity of individual dosing schedules.
What’s Included:
Flourish – Comprehensive plant supplement
Flourish Iron – Concentrated iron supplement
Flourish Potassium – Potassium supplement for strong growth
Features & Benefits:
Complete nutrient solution for planted aquariums
Supports healthy growth and vibrant plant color
Ideal for low to medium light setups
Simple and easy fertilization system
Helps prevent common nutrient deficiencies
Safe for fish, shrimp, and other invertebrates
Trusted quality by Seachem
Ideal For:
Freshwater planted aquariums
Beginner and intermediate aquascapers
Low to moderate light planted tanks
For freshwater aquariums only. Use as directed. Best used as part of a balanced planted aquarium maintenance routine.
Seachem PolyGuard (10g)
Seachem PolyGuard is a broad-spectrum medication formulated to treat multiple external infections in freshwater fish. It is effective against fungal, bacterial, and parasitic diseases, making it a powerful solution when the exact cause of illness is unknown.
PolyGuard is especially useful for newly introduced fish, quarantine tanks, or cases involving mixed infections. When used as directed, it provides fast, effective treatment without harming biological filtration.
Features & Benefits:
Broad-spectrum treatment for fungal, bacterial, and parasitic infections
Ideal when the cause of disease is uncertain
Suitable for quarantine and hospital tanks
Effective against external infections
Does not damage biological filtration when used correctly
Trusted quality by Seachem
Available Size:
PolyGuard – 10g
For freshwater aquariums only. Remove chemical filtration during treatment. Use as directed.
Seachem Pond Clarigen – 500 ml / 1 L
Description
A powerful and all‑in‑one water clarifier for decorative ponds that helps clear virtually all types of cloudiness. Pond Clarigen™ uses an advanced polymeric flocculating agent that is safe for fish, plants, and aquatic life, and provides fast visible results — typically within 1–2 hours after dosing. Unlike other clarifiers that require multiple products, this single formula addresses organic, particulate, and chemical cloudiness in one dose.
Key Features
• Advanced polymeric flocculating formula• Clears all types of pond cloudiness• Safe for fish, plants, and aquatic life• Fast‑acting clarity boost• Available in 500 ml and 1 L sizes
Benefits
✔ Removes cloudiness from pond water✔ Works on organic, particulate & chemical turbidity✔ Safe for fish, plants, and beneficial bacteria✔ Helps restore crystal‑clear water quickly
Usage
Shake well before use.
Add 10 mL per 400 L (100 US gallons) of pond water.
In heavy cloudiness, you may safely dose up to 3× the normal amount (10 mL per 133 L / 33 US gal), but proceed with caution and observe fish.
Allow 1–2 hours for clarification — water may look cloudier initially as particles bind.
Clean filter media if needed after water clears.
Seachem Pond HealthGuard – 500 ml
Description
A concentrated, safe disinfectant for decorative ponds that helps control parasitic, bacterial, fungal, and viral infestations without discoloring water or causing foaming. It’s formulated to be gentle on fish, plants, and your pond’s biological filter, making it ideal for maintaining a healthy aquatic environment.
Key Features
• Advanced disinfectant formula for pond use • Controls parasitic, bacterial, fungal, and viral issues • Does not discolor water or produce foam • Safe for fish, aquatic plants, and biological filters when used as directed • Available in 500 ml and 1 L sizes
Benefits
✔ Helps reduce disease and infestations in pond fish ✔ Maintains water clarity without foaming ✔ Safe for use around plants and beneficial bacteria ✔ Supports a healthier, more balanced pond environment
Usage
Calculate pond volume.
Add 125 ml per 1000 L (250 US gal) daily until conditions improve.
For maintenance, use 125 ml per 2000 L (500 US gal) daily for about a week.
Distribute widely to avoid localized overdosing.
Seachem Pond Matrix – 2 L / 20 L
Description
A high‑porosity biological filtration media designed for pond use. Seachem Pond Matrix provides enormous internal surface area ideal for colonization by beneficial bacteria that break down ammonia, nitrite, and even help reduce nitrate in your pond’s filter system. It’s inert, durable, and effective for long‑term biological filtration without frequent replacement.
Key Features
• High‑porosity biomedia with internal macropores for bacteria growth • Provides efficient biofiltration for nitrogenous waste • Supports aerobic and anaerobic bacteria species • Controls ammonia, nitrite, and nitrate levels • Inert and long‑lasting—does not break down or need regular replacement
Benefits
✔ Encourages robust biological filtration✔ Helps maintain cleaner, healthier pond water✔ Supports beneficial bacteria that process waste✔ Long‑lasting media—minimal change‑out required
Usage
Rinse Pond Matrix thoroughly before use.
Place media in a pond filter, waterfall filter, or biological filtration chamber.
Use about 1–2 L per 380 L (100 US gal) of pond water as a general guide.
Rinse occasionally in pond water to remove debris while preserving beneficial bacteria.