It is toxic for axolotls. If you have a filter, you’ll want to change about 20 percent of the water weekly and be sure to remove any waste from the bottom of the tank. If you don’t have a filter, ...
A filter must be properly sized to the volume of water in the tank, which should be a minimum tank size of 20 gallons. Tanks of 20 to 40 gallons are the typical range for axolotls. In general, ...