Seachem

214 products

  • Last stock! Seachem Pond pH Buffer – 1 L

    Seachem Pond pH Buffer – 1 L

    Seachem Pond pH Buffer – 1 L Description A phosphate‑free pH buffering solution designed for decorative ponds. Pond pH Buffer safely raises and stabilizes pH to an optimal range between 7.2 and 8.2, helping create a healthier environment for koi, goldfish, aquatic plants, and other pond inhabitants without encouraging algae growth. It’s especially useful for ponds with liners or unstable pH levels. Key Features • Raises and buffers pond pH between 7.2–8.2• Phosphate‑free formula — will not promote algae growth• Safe for fish, plants, and pond life• Designed for decorative and planted ponds• Easy liquid dosing Benefits ✔ Helps maintain stable pH in pond water✔ Creates a healthier, balanced environment for fish and plants✔ Phosphate‑free — reduces risk of algae issues✔ Suitable for liner ponds and fluctuating pH conditions Usage Test your pond’s pH before dosing. Add 500 mL per 1000 L (250 US gal) of pond water daily until target pH is reached. Add near a pump intake for optimal mixing and dispersion. Re‑test pH after each dose and adjust as needed to maintain stability.

    R 729.00

  • Last stock! Seachem Pond Matrix – 2 L / 20 L Seachem Pond Matrix – 2 L / 20 L

    Seachem Pond Matrix – 2 L / 20 L

    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.

    R 734.00 - R 4,177.00

  • Last stock! Seachem Pond HealthGuard – 500 ml

    Seachem Pond HealthGuard – 500 ml

    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.

    R 524.00

  • Last stock! Seachem Pond Clarigen – 500 ml / 1 L Seachem Pond Clarigen – 500 ml / 1 L

    Seachem Pond Clarigen – 500 ml / 1 L

    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.

    R 550.00 - R 931.00

  • Last stock! Seachem Pearl Beach – 3.5 kg / 10 kg Seachem Pearl Beach – 3.5 kg / 10 kg

    Seachem Pearl Beach – 3.5 kg / 10 kg

    Seachem Pearl Beach – 3.5 kg / 10 kg Description A natural aragonite substrate for marine, reef, and tropical aquariums. Seachem Pearl Beach helps stabilize calcium and alkalinity while reducing large drops in pH, creating a healthy and stable foundation for your aquarium. It is sold dry, giving you more substrate per bag compared to wet alternatives. Key Features • Natural aragonite substrate for marine and reef tanks• Assists in stabilizing calcium and alkalinity• Helps prevent large pH declines• Dry substrate — more volume per bag than wet products• Suitable for reef, marine, and tropical aquariums Benefits ✔ Helps maintain stable water chemistry✔ Supports balanced calcium and alkalinity levels✔ Reduces risk of pH swings✔ Provides a natural, attractive substrate foundation Usage Rinse thoroughly before use to remove residual dust. Spread evenly across the aquarium bottom to your desired depth. Add water slowly to avoid disturbing the substrate bed. If initial cloudiness occurs, use mechanical filtration to clear water.

    R 412.00 - R 800.00

  • Last stock! Seachem Meridian 3.5 kg-9 kg Seachem Meridian 3.5 kg-9 kg

    Seachem Meridian 3.5 kg-9 kg

    Seachem Meridian  3.5 kg-9 kg Description A natural oolitic (egg‑shaped) aragonite substrate designed for marine, reef, and tropical aquariums. Seachem Meridian features a uniform grain size that supports reef inhabitants while helping stabilize calcium and alkalinity and reduce large pH swings in your aquarium. Its dry formulation means you pay for pure substrate without unnecessary water weight. Key Features • Natural oolitic aragonite substrate• Uniform .25–.50 mm grain size• Helps stabilize calcium and alkalinity• Assists in preventing large pH declines• Dry product with no water filler Benefits ✔ Helps maintain stable aquarium water chemistry✔ Supports balanced calcium and alkalinity levels✔ Reduces the risk of sudden pH drops✔ Provides a reef‑friendly substrate foundation Usage Rinse substrate thoroughly before use to remove dust. Spread evenly across the aquarium bottom to desired depth. Add water slowly to avoid disturbing the substrate bed. Use mechanical filtration or filter floss to clear initial cloudiness as needed.

    R 412.00 - R 778.00

  • Last stock! Seachem Gray Coast 3.5kg-10kg Seachem Gray Coast 3.5kg-10kg

    Seachem Gray Coast 3.5kg-10kg

    Seachem Gray Coast 3.5kg-10kg Description A 100% natural calcite substrate designed for reef, marine, and tropical aquariums. Gray Coast helps stabilize calcium and alkalinity, prevent large drops in pH, and provides a natural base for your aquarium’s chemistry, while offering an attractive substrate that can enhance the look of your tank. Key Features • Natural calcite substrate for marine, reef, and tropical aquariums • Assists in stabilizing calcium and alkalinity • Helps prevent large pH declines • High in magnesium and trace minerals • Sold dry to provide more substrate per bag vs wet alternatives Benefits ✔ Provides a natural calcite base that supports reef water chemistry ✔ Helps maintain stable calcium and alkalinity levels ✔ Reduces risk of sudden pH drops ✔ Rich mineral content supports overall aquarium health Usage Rinse thoroughly before use to remove any residual dust. Spread evenly across the aquarium bottom to desired depth. Add water slowly to avoid disturbing the substrate. Use mechanical filtration (filter floss) to clear initial cloudiness if needed.

    R 412.00 - R 800.00

  • Last stock! Seachem Marine Trace 250 ml-500 ml

    Seachem Marine Trace 250 ml-500 ml

    Seachem Marine Trace  250 ml-500 ml Description A comprehensive trace element supplement formulated for marine and reef aquariums. Seachem Marine Trace replenishes essential trace elements that are quickly depleted through coral uptake, filtration, and biological processes. Regular supplementation supports coral health, coloration, and overall aquarium stability. Key Features • Broad‑spectrum trace element formula• Replenishes trace elements lost in marine systems• Supports coral health and metabolic processes• Suitable for reef aquariums with SPS, LPS, and soft corals• Easy‑to‑dose liquid formula Benefits ✔ Restores essential trace elements✔ Supports coral coloration and vitality✔ Helps maintain a balanced marine environment✔ Complements regular reef supplementation routines Usage Determine the appropriate dose based on aquarium size. Add directly to a high‑flow area of the aquarium or sump. Re‑test water parameters periodically. Adjust dosing as needed to maintain stable trace element levels.

    R 232.00 - R 374.00

  • Last stock! Seachem Marine Buffer 250 ml -500 ml

    Seachem Marine Buffer 250 ml -500 ml

    Seachem Marine Buffer 250 ml -500 ml Description A highly concentrated alkalinity supplement formulated for marine and reef aquariums to help maintain stable carbonate hardness (KH) and pH. Seachem Marine Buffer replenishes alkalinity lost through coral growth, filtration, and biological activity, supporting healthy coral and invertebrate development and overall water stability. Key Features • Concentrated alkalinity supplement for marine aquariums• Helps maintain stable carbonate hardness (KH)• Supports pH stability• Ideal for reef systems with SPS, LPS, and soft corals• Easy-to-dose liquid formula Benefits ✔ Maintains stable alkalinity levels✔ Helps prevent pH fluctuations✔ Supports coral and invertebrate health✔ Promotes a balanced and stable marine environment Usage Test alkalinity levels before dosing. Determine the required dose based on aquarium volume and test results. Add directly to a high-flow area of the aquarium or sump. Re-test water parameters and adjust dosing as needed.

    R 248.00 - R 420.00

  • Last stock! Seachem Reef Reactor Md 2 L -4 L

    Seachem Reef Reactor Md 2 L -4 L

    Seachem Reef Reactor Md 2 L -4 L Description Coarse, high‑purity aragonite media designed for calcium reactors in reef aquariums. Seachem Reef Reactor Md dissolves gradually to supply essential elements such as calcium, magnesium, strontium, potassium, and carbonates, helping maintain balanced water chemistry and support healthy coral growth. Ideal for reef systems that need stable alkalinity and trace element supplementation. Key Features • Coarse aragonite reactor media for calcium reactors• Supplies calcium, magnesium, strontium, potassium, and carbonates• Designed for stable, controlled dissolution• Supports balanced reef water chemistry• Available in 2 L and 4 L sizes Benefits ✔ Helps maintain stable alkalinity and pH✔ Supplies essential reef elements for coral growth✔ Supports strong coral skeletal development✔ Promotes balanced and healthy reef conditions Usage Rinse media thoroughly before first use. Fill your calcium reactor with the Reef Reactor Md media. Adjust CO₂ injection and water flow to achieve desired dissolution rate. Test calcium, alkalinity, and magnesium levels regularly and adjust reactor settings as needed.

    R 721.00 - R 1,087.00

  • Last stock! Seachem Reef Reactor Lg 2 L -4 L

    Seachem Reef Reactor Lg 2 L -4 L

    Seachem Reef Reactor Lg  2 L- 4 L Description A coarse, high‑purity aragonite calcium reactor media designed for reef aquariums. This large‑grain media supplies essential elements including calcium, magnesium, strontium, potassium, and carbonates as it slowly dissolves in a calcium reactor with CO₂, helping maintain balanced water chemistry and support robust coral growth and coloration. Key Features • Coarse, high‑purity aragonite calcium reactor media (1–3 cm grain size) • Supplies calcium, magnesium, strontium, potassium, and carbonates • Supports balanced reef water chemistry • Excellent for use in calcium reactors with CO₂ dissolution • Available in larger media size for slower dissolution Benefits ✔ Promotes stable alkalinity and pH balance ✔ Supplies a broad range of essential reef elements ✔ Supports strong coral skeletal formation and coloration ✔ Offers balanced supplementation with high soluble potassium and low impurities Usage Rinse media before first use. Fill your calcium reactor with the Reef Reactor media. Adjust CO₂ injection and water flow to control dissolution rate. Regularly test calcium, alkalinity, and magnesium levels and adjust reactor settings

    R 712.00 - R 1,087.00

  • Last stock! Seachem Reef Kalkwasser250 g- 500 g

    Seachem Reef Kalkwasser250 g- 500 g

    Seachem Reef Kalkwasser  250 g- 500 g Description A high-purity calcium hydroxide supplement for reef aquariums, designed to maintain optimal calcium and alkalinity levels while raising pH naturally. Seachem Reef Kalkwasser supports strong coral skeletal growth, stabilizes water chemistry, and enhances overall reef health. Ideal for SPS, LPS, and soft corals. Key Features • High-purity calcium hydroxide for reef aquariums• Maintains calcium and alkalinity levels• Naturally raises and stabilizes pH• Supports coral skeletal growth and development• Easy-to-use powder for precise dosing Benefits ✔ Promotes strong coral skeletal growth✔ Stabilizes calcium, alkalinity, and pH✔ Enhances overall reef vitality and health✔ Supports healthy SPS, LPS, and soft corals Usage Test calcium and alkalinity levels before dosing. Mix the powder with freshwater to create a saturated solution. Add the solution slowly to the aquarium or sump, preferably via a drip system. Monitor calcium, alkalinity, and pH levels regularly and adjust dosing as needed.

    R 410.00 - R 513.00

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