Nitrate & Plants - Calculate how much plant growth you need to keep nitrate levels constant.
Water changes & temperature - Calculate how much the temperature changes in your tank when changing water with a different temperature.
Water changes & pH - Calculate how much the pH changes in your tank when changing water with a different pH.
Nitrate water change - Calculate how much water to change to reduce the nitrate in your aquarium.
Ammonia dosing for cycling - Calculate how much ammonia you need to add during fishless cycling.
Bicarbonate (KH) dosing - Calculate the amount of sodium bicarbonate is needed to reach a certain KH level.
Calculate pH from KH and CO2 - Calculate the pH value for a certain KH and CO2 level.

Pleco cave size - Calculate how big the cave needs to be for a certain size pleco.
Substrate volume & weight - Calculate how much substrate you need for your tank, based on the size of the base of the tank.
Aquarium volume and weight calculator - Calculate the weight of the aquarium, including glass and substrate
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