ReyK
Aquarium Advice Regular
I've had a Tetra 3i in my 3-gallon cherry shrimp tank, and it's completely cycled and everything, but I just got a sponge filter so I can eventually try to breed my shrimp. They're both air-powered and I only have one air pump, so I hooked up the air line to the new sponge filter but left the 3i in the tank because I didn't know what to do with it yet. Since I've replaced the filter, will my tank need to cycle again or will the bacteria from the old filter go to the new one? I know I probably sound pretty dumb, but any help is appreciated.