I’m switching from a tetra whisper to a sponge filter for my Betta and embers. The old filter media won’t fit in sponge liter so should I just leave the cartridge in the tank under a rock for a week? Or do I have to leave them both rubbing? I don’t want to add to much of a current with both of them.
Does anyone know of any leaves that won’t lower PH?
Does anyone know of any leaves that won’t lower PH?