Aquarium CO2 Calculator

Calculate dissolved CO2 levels using pH and KH readings for planted aquariums.

pH Level

KH (dKH)

Uses the proven CO2 = 3 x KH x 10^(7-pH) formula.

Color-coded warnings for levels dangerous to fish.

Target 15-30 ppm for optimal plant growth without harming fish.

Calculate aquarium volume in gallons and liters for rectangular, bowfront, cylinder, and hexagonal tanks. Free tool.

Calculate how many fish your aquarium can safely hold. Based on tank volume, filtration, and fish size. Free tool.

Calculate the right heater wattage for your aquarium based on tank volume and temperature difference. Free tool.

Calculate fertilizer doses for planted aquariums. Supports EI dosing, PPS-Pro, and custom schedules. Free tool.

Loading tool...

You Might Also Like