i currently have a wet/dry with bio balls on a 60 gal with LR and LS and a few snails and crabs. i set it up about a month ago not knowing that bio balls are not recommended for a reef tank. i want to take out the bio ball tower and use just the sump and put LR and LS in it. any suggestions on how to do this without causing the amonia to rise? any help is greatly appriciated.