I want to install a internal oerflow box in my tank, but i have put my fish in another tank to do it. If I buy a 30g
sump tank, can I put the
LR, fish, substrate and water in without cycling it while i work on my main tanks overflow. i would hook up the canister to the sump tank.
When i finished the main tank i would move everything back but change the substrate (from crushed coral to
live sand 2") but let it run on the canister til i finished the sump. after i finished the sump i would put the canister media in the sump and run the sump as the final setup. Is this possible will changing substrate make a deadly cycle?