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.

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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.

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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.

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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.

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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.

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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

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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.

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Seachem Reef Builder 300 g- 4 kg Description A high-purity calcium and alkalinity supplement for reef aquariums, designed to support rapid and healthy coral skeletal growth. Seachem Reef Builder maintains optimal calcium and alkalinity levels while helping to stabilize magnesium, promoting vibrant corals, strong skeletal development, and a balanced reef environment. Ideal for SPS, LPS, and soft corals. Key Features • High-purity calcium and alkalinity supplement• Supports strong coral skeletal growth• Stabilizes magnesium levels in the aquarium• Promotes healthy SPS, LPS, and soft coral development• Easy-to-dissolve powder for accurate dosing Benefits ✔ Supports rapid and healthy coral growth✔ Enhances coral coloration and vitality✔ Maintains stable calcium, alkalinity, and magnesium levels✔ Promotes overall reef stability and health Usage Test calcium and alkalinity levels before dosing. Determine the required amount based on aquarium volume and test results. Dissolve the powder in freshwater or saltwater before adding to the aquarium, or dose directly into a high-flow area. Monitor calcium and alkalinity levels regularly and adjust dosing as needed.

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Seachem Reef Buffer 250 g-1 kg Description A high-purity, advanced alkalinity supplement for reef aquariums, designed to maintain stable carbonate hardness (KH) and support coral and invertebrate health. Alkalinity is essential for coral skeletal formation, biological processes, and overall reef stability. Regular use helps prevent pH swings and promotes a healthy, thriving reef environment. Key Features • High-purity alkalinity supplement for reef aquariums• Maintains stable carbonate hardness (KH)• Supports coral skeletal growth and invertebrate health• Helps prevent pH fluctuations• Easy-to-dissolve powder for accurate dosing Benefits ✔ Maintains stable alkalinity levels in reef systems✔ Supports healthy coral and invertebrate growth✔ Prevents pH swings and promotes water stability✔ Enhances overall reef vitality and coloration Usage Test alkalinity levels before dosing. Determine the required amount based on aquarium volume and test results. Dissolve the powder in freshwater or saltwater before adding to the aquarium, or dose directly into a high-flow area. Monitor alkalinity levels regularly and adjust dosing as needed.

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Seachem Reef Advantage Strontium 300g-600g Description A high-purity, advanced strontium supplement for reef aquariums, formulated to support optimal strontium levels essential for coral skeletal growth and coralline algae development. Strontium works alongside calcium and magnesium to strengthen coral skeletons and maintain a balanced reef environment. Regular supplementation helps sustain vibrant and healthy reef systems. Key Features • High-purity strontium supplement for reef aquariums• Supports coral skeletal formation and growth• Promotes healthy coralline algae development• Complements calcium and magnesium supplementation• Easy-to-dissolve powder for precise dosing Benefits ✔ Supports strong coral skeletons and growth✔ Enhances coralline algae health and coloration✔ Helps maintain balanced trace element levels✔ Promotes overall reef stability and vitality Usage Test strontium levels before dosing. Determine the required amount based on aquarium volume and test results. Dissolve the powder in freshwater or saltwater before adding to the aquarium, or dose directly into a high-flow area. Monitor strontium levels regularly and adjust dosing as needed.

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Seachem Reef Advantage Magnesium – 300 g - 4 kg Description A high-purity, advantage magnesium supplement for reef aquariums, designed to maintain optimal magnesium levels and support coral and invertebrate health. Magnesium helps stabilize calcium and alkalinity levels, promotes healthy skeletal growth in SPS and LPS corals, and supports coralline algae development. Regular supplementation ensures a balanced and thriving reef environment. Key Features • High-purity magnesium supplement for reef aquariums• Stabilizes calcium and alkalinity levels• Supports coral skeletal growth and invertebrate health• Promotes coralline algae development• Easy-to-dissolve powder for accurate dosing Benefits ✔ Maintains stable magnesium levels in reef systems✔ Supports strong coral growth and skeletal development✔ Helps stabilize calcium and alkalinity✔ Enhances overall reef vitality and health Usage Test magnesium levels before dosing. Determine the required amount based on aquarium volume and test results. Dissolve the powder in freshwater or saltwater before adding to the aquarium, or dose directly into a high-flow area. Monitor magnesium levels regularly and adjust dosing as needed.

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Seachem Reef Advantage Calcium – 250 g - 4 kg Description A high-purity, advantage calcium supplement for reef aquariums, formulated to support strong coral skeletal growth and healthy invertebrate development. Calcium is a critical element for SPS, LPS, and soft corals, as well as coralline algae. Regular supplementation helps maintain optimal calcium levels, ensuring vibrant coral growth and a stable reef environment. Key Features • High-purity calcium supplement for reef aquariums• Supports coral skeletal formation and invertebrate health• Maintains stable calcium levels in reef systems• Suitable for SPS, LPS, soft corals, and coralline algae• Easy-to-dissolve powder for accurate dosing Benefits ✔ Promotes strong coral skeletal growth✔ Supports healthy growth of invertebrates✔ Helps maintain stable calcium levels✔ Enhances coral coloration and vitality Usage Test calcium levels before dosing. Determine the required amount based on aquarium volume and test results. Dissolve the powder in freshwater or saltwater before adding to the aquarium, or dose directly into high-flow areas. Monitor calcium levels regularly and adjust dosing as needed.

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