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Calculate how much substrate you need for your aquarium by weight and volume.
Gravel, sand, planted soil, and crushed coral with accurate densities.
Know exactly how many bags to buy in 5, 10, and 20 lb sizes.
Set your desired substrate depth for accurate volume calculations.
Calculate aquarium volume in gallons and liters for rectangular, bowfront, cylinder, and hexagonal tanks. Free tool.
Aquarium & FishkeepingCalculate how many fish your aquarium can safely hold. Based on tank volume, filtration, and fish size. Free tool.
Aquarium & FishkeepingCalculate the right heater wattage for your aquarium based on tank volume and temperature difference. Free tool.
Aquarium & FishkeepingCalculate CO2 levels in your planted aquarium from pH and KH readings. Optimize plant growth. Free tool.
Aquarium & Fishkeeping