Seachem Equilibrium – Sodium-Free GH & Mineral Booster for Planted Tanks

The mineral balance planted tanks need — minus the sodium.

RO, DI, and soft water lack the minerals plants and fish need, but most GH boosters are mostly cheap sodium chloride, which can harm plant growth.

Seachem Equilibrium raises general hardness (GH) with only calcium, magnesium, and potassium salts — no sodium or chloride — so it supports fish metabolism and plant growth while keeping KH stable. Ideal for RO/DI or any mineral-deficient water.

Seachem Laboratories has engineered aquarium water chemistry since 1979 from its labs in Madison, Georgia, where in-house chemists formulate products that work together as a system. Equilibrium reflects that plant-first thinking: it is built specifically for the planted aquarium, using potassium, calcium, and magnesium salts — deliberately no sodium or chloride — and it is designed to balance with, rather than disturb, carbonate hardness.

1. To raise GH by 1 meq/L (3 dH), add 16 g (1 tbsp) per 80 L (20 gallons).
2. Pre-mix with 1 L of water; a brief haze clears in 15–30 minutes.
3. Target about 1–2 meq/L (3–6 dH), matching your KH.

Feed your plants and fish the right minerals. Add to cart.

Why Seachem Equilibrium

• Sodium- and chloride-free: raises GH with calcium, magnesium, and potassium only, so plant growth isn't held back.
• Planted-tank potassium: supplies soluble potash (K2O) plants use, alongside the calcium and magnesium fish need.
• Works with your KH: balances and stabilizes carbonate hardness rather than disturbing it.
• Precise, measurable dosing: a published dose (16 g per 80 L raises GH by 3 dH) lets you hit an exact target.

Best For

Planted aquariums on RO/DI or soft, mineral-deficient water where you need to build general hardness for both plants and fish without adding sodium.

FAQ

Who is this for? Planted RO/DI and soft-water tanks — it mineralizes pure or low-mineral water for plant growth and fish osmoregulation.

Does it change my KH or pH? Equilibrium raises GH and is designed to balance with carbonate hardness; to set or maintain KH, use Alkaline Buffer alongside it.

How much do I dose to a target GH? To raise GH by 1 meq/L (3 dH), add 16 g (1 tablespoon) per 80 L (20 gallons); a general target is 1–2 meq/L (3–6 dH), matching KH. For non-RO water, measure GH first.

What It Does

Raises the essential mineral/electrolyte content (GH) with calcium, magnesium, and potassium — no sodium or chloride. Balances with and stabilizes carbonate hardness; maintain KH with Alkaline Buffer. Ideal for RO/DI and mineral-deficient water.

Directions

To raise GH by 1 meq/L (3 dH), add 16 g (1 tablespoon) per 80 L (20 US gallons) at setup or with water changes (add to new water). For best solubility, mix with 1 L of water first (it turns opaque white); a slight haze in the tank clears in 15–30 minutes. Based on DI/RO water — for other water, measure GH first. A general target is 1–2 meq/L (3–6 dH), matching KH.

Guaranteed Analysis

Soluble potash (K2O) 23.0% · Calcium 8.06% · Magnesium 2.41% · Iron 0.11% · Manganese 0.06%. Derived from potassium sulfate, calcium sulfate, magnesium sulfate, ferric sulfate, manganese sulfate.

Available Sizes

300 g, 600 g, 4 kg