Recommended Dosage

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Net Volume

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Gross Volume

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Pro Tips & Safety

How it Works

This calculator uses the Net Water Volume principle. Most hobbyists dose based on the manufacturer's tank size (e.g., 20 gallons), but after adding 2 inches of substrate and 15 lbs of rock, the actual water volume might only be 16 gallons. Dosing for 20 gallons in a 16-gallon environment leads to a 25% overdose.

Safety Disclaimer: Calculations are estimates. Always observe your livestock after dosing. If fish gasp at the surface, perform an immediate water change.