Aquarium Salt Calculator
Calculate aquarium salt doses for treatment or marine salinity.
How it works
Aquarium salt (freshwater treatment): a common dose is 1-3 g per litre depending on severity. Marine mixing: add reef salt to reach 1.020-1.025 specific gravity (≈ 33-35 ppt), about 35 g per litre, measured with a refractometer.
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Formula & Method
Aquarium salt (freshwater treatment): a common dose is 1-3 g per litre depending on severity. Marine mixing: add reef salt to reach 1.020-1.025 specific gravity (≈ 33-35 ppt), about 35 g per litre, measured with a refractometer.
Example Calculation
To dose a 60 L hospital tank at 2 g/L: 60 × 2 = 120 g of aquarium salt, dissolved before adding.
Frequently Asked Questions
Is aquarium salt safe for all fish?
No. Many soft-water fish, catfish and some plants are salt-sensitive. Use treatment salt cautiously and never in planted display tanks.
How do I mix marine salt?
Add reef salt to RO water to reach 1.020-1.025 specific gravity using a refractometer, and let it mix and aerate before use.