Ok i picked up a biocube 29 from petsmart that was on sell for 30% off. its has had water in it for about a week and LR for about 5 days this is my first biocube so need help. have about 40lb of LR and im using 30LB aragonite sand. for now i dont have the money for a good protein skimmer so im going to do weekly water changes. have the bio balls in there is it good or bad? if bad what do i replace it with that kind of filters should i run? and my water flow is about 700gph and dont know what im going to stock it with right now. its got the stock lighting P.S. plan on taking my time