Seachem Replenish 250ml

Description

Replenish™ is a proprietary blend of salts designed to replenish physiologically relevant minerals that are removed by reverse osmosis or deionizing filtration. Replenish™ restores General Hardness (GH) using a balanced blend of both “soft” (sodium, potassium) and “hard” (calcium, magnesium) salts. Restoration of mineral content is essential since a complete lack of minerals will result in osmotic stress in those species whose osmoregulation systems are adapted to a mineralized environment. Severe osmotic stress can result in osmotic shock which will lead to rapid death.
To restore GH in the planted aquarium, we recommend Equilibrium™.
Add 5 mL (1 capful) Replenish™ to 40 L (10 US gallons) to raise GH by 1 meq/L (2.8 dGH). Recommended restoration level into DI or RO water is 1-2 meq/L which is 5 mL per each 20-40 L (5-10 US gallons.)

Seachem Replenish for RO and Soft Water Tanks

Replenish is for hobbyists who run reverse osmosis or deionised water and need to add minerals back before it touches livestock. Our local tap water is already on the soft, slightly acidic side, and many keepers strip it further with RO to control TDS for sensitive fish or to mix precise breeding water. Pure RO has almost no general hardness, which stresses the osmoregulation of most aquarium fish, so remineralising is not optional.

This blend rebuilds GH with a balance of calcium, magnesium, sodium and potassium salts. Dose into the new water and check GH with a test kit until you hit the range your species prefers rather than guessing. For shrimp keepers we usually point to dedicated shrimp GH boosters instead, since those raise hardness without adding the sodium and potassium component.

See related products on our conditioners and medication page, and get the dosing right with our RO remineralising guide and GH and KH guide.