Okay I just added a cleanup crew to my 75g..... What I am afraid of is that once the algae is gone and I don't have any fish in the tank yet should I be supplementally feeding them? I haven't seen anything about feeding other than they will scavenge for leftovers from feeding the fish. Should I add some dry seaweed such as Nori occasionally and maybe adding some fish food to give them something to chew on? There are about 50 hermits, 50 mixed nassarius/cerith snails, 25 nerite snails and about 12 mexican turbos and 5 peppermint shrimp.