should i take out all my crushed coral and add sand? or just a little at a time? i currently have a yellow tang, pigmy angel, and a damsel in the 29gal. would they be okay during the switch or should i relocate them?
i currently run a can. filter, berlin skimmer, and 3x turbo twist uv. i have about 15-20 lbs of live rock in the tank. would this mess up my bacterial colony by changing substrate?