Seachem Equilibrium 300g | Planted Aquarium GH Mineral Supplement for RO/DI Water Remineralisation

A specialised mineral supplement designed to restore and maintain ideal general hardness (GH) in planted aquariums, especially when using RO or DI water.

Helps create a stable, plant-friendly aquatic environment by supplying essential minerals without sodium chloride.

Key Benefits

• Raises general hardness (GH) in freshwater aquariums
• Ideal for RO/DI and mineral-deficient water
• Supports healthy plant growth in planted tanks
• Provides calcium, magnesium and potassium
• Free from sodium chloride
• Helps support fish metabolism and overall aquarium stability

How to Use

Dosage: To raise mineral content/general hardness (GH) by 1 meq/L (3 dH), add 16 g (1 tablespoon) for every 80 L (20 US gallons) when setting up an aquarium or when making water changes.

• Add to new water only when setting up a tank or during water changes
• For best results, dissolve in 1 L of water before adding to the aquarium
• The mixed solution may appear white and opaque when prepared
• When added to the tank, a slight haze may occur and should clear within 15–30 minutes
• Do not use when replacing evaporated water
• This dosage assumes RO or DI water; test other water types before use
• Typical target GH: 1–2 meq/L (3–6 dH), or match desired KH balance

Who It’s For

• Planted aquarium hobbyists
• Users of RO or DI water systems
• Fish keepers managing mineral-deficient water
• Anyone focused on stable planted tank environments

Why You’ll Love It

A precise mineral solution that helps recreate stable, natural freshwater conditions for thriving planted aquariums and long-term aquatic health.