My 68 gallon tank has been running for a week now. I have already cured live rock in the tank so there has been no cycle. I tested for nitrite, nitrate, and ammonia and all were 0. Tomorrow, I plan on going to the fish store to confirm that my water parameters are indeed good. If they check to be fine, I'd like to buy some livestock. So my question is what should I buy first: two false perculas, one or two soft corals, or a cleanup crew? Thanks.