My tank has been running for a week and 4 days now. The levels are all low, 10 lbs of live rock is covered in the coraline algae, i bought that carib sea live sand that comes in a sealed bag containing sea water. So the question is: my lfs store said i could have 3 chromis for free or 12 dollars toward anything else in the store. Would yall recommend putting one tank bred percula or ocellaris clown fish in the tank instead of the 3 chromis? I don't want to hur any fish. Do you think it will survive? Thanks!!