I just got a 12G Nano Cube DX. At the back of the tank are 3 small compartment. The overflow goes to a compartment with coarse filter, next is where the carbon, ceramic, and bio-balls go, and lastly the pump.
I'm removing everything in the middle compartment (e.g. carbon, bio-balls, ceramics). What should I put in there? LR, LS, or more coarse sponge for copepods?
I'm removing everything in the middle compartment (e.g. carbon, bio-balls, ceramics). What should I put in there? LR, LS, or more coarse sponge for copepods?