no never have used chemicals. when i do clean anything in my tank it will be cleaned in the old tank water when im doing a water change. or using a sponge if its to clean the algae on the walls of the tank.
i think i may just wait for a few days and see how the cardinals go. if they do die, i think i might get some more hardy fish like zebra danios and let the tank mature more then maybe try introduce some more cardinals.
i think i may just wait for a few days and see how the cardinals go. if they do die, i think i might get some more hardy fish like zebra danios and let the tank mature more then maybe try introduce some more cardinals.