Seachem Replenish – Mineral Supplement for Freshwater Aquariums Using RO/DI Water (250ml)

Seachem Replenish is a proprietary blend of physiologically relevant mineral salts formulated to restore General Hardness (GH) in freshwater aquariums, especially those using reverse osmosis (RO) or deionized (DI) water. These filtration methods strip water of all minerals, which can lead to osmotic stress and shock in fish.

Replenish contains a balanced mix of “soft” salts (sodium, potassium) and “hard” salts (calcium, magnesium) to replicate the mineral profile of natural freshwater environments. It is ideal for community tanks and mineral-sensitive species but is not recommended for planted aquariums due to its sodium and chloride content.

Key Features:

• Restores essential electrolytes removed by RO/DI filtration
• Prevents osmotic stress and shock in freshwater fish
• Replenishes calcium, magnesium, sodium, and potassium
• Phosphate-free – will not promote algae growth
• Safe for all freshwater fish and invertebrates (not ideal for plants)

Product Specifications:

• Brand: Seachem
• Volume: 250ml
• Form: Liquid
• Country of Origin: United States

Directions for Use:

• Add 5 mL (1 capful) per 40 L (10 US gallons) to raise GH by 1 meq/L (2.8 dGH)
• Recommended GH range: 1–2 meq/L (2.8–5.6 dGH) for community tanks
• Use during water changes or when preparing RO/DI water for top-offs
• Do not overdose – monitor GH with a reliable test kit

Pro Tips:

• For planted aquariums, use Seachem Equilibrium™ instead
• Use in combination with Seachem Prime® or Stability® for optimal water conditioning
• Store in a cool, dry place and shake well before use