Magnesium sulfate (MgSO₄), also called magnesium sulphate or Epsom salts, is a water-soluble dry aquarium plant fertilizer that supplies magnesium and sulfur for freshwater planted aquariums. Use it alongside other fertilizers as part of a balanced nutrient routine.
Product details
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Net weight: 180 g
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Packaging: Resealable jar for convenient storage
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Nutrients supplied: Magnesium (Mg) and sulfur (S)
Guaranteed Analysis:
Magnesium (Mg) – 9.8%
Derived From: Magnesium Sulfate Heptahydrate (MgSO₄·7H₂O; CAS 10034-99-8)
Part of your planted aquarium routine
Magnesium sulfate lets you supplement magnesium without adding nitrate or phosphate. It is one ingredient in a fertilizing routine; your plants may also need nitrogen, phosphorus, potassium, calcium and trace nutrients from other sources.
Dosing
Your dose depends on actual aquarium water volume, the product’s analysis and the nutrients already supplied by your water and other fertilizers. Weigh dry fertilizer with a suitable scale and account for overlapping nutrients when combining products.
Open our fertilizer dosing calculator
Use a calculator reference that matches your product’s composition and guaranteed analysis. Calculator results are estimates of nutrient additions; adjust your routine using plant growth and water tests.
Storage
Keep the jar tightly sealed in a cool, dry place. Keep out of reach of children and pets.
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