I have done saltwater for a couple years now and ive just done FOWLR. recently started a 75 gal reef tank with a 40 gal sump refugium. just a couple of questions about the fuge and so far no one can really give me a good answer. as far as chaeto whats the best/ cheapest lighting to get and do you leave it on 24 hours a day or just turn it on at night when display tank lights are off?? secondly is it a good or bad idea to put a couple cerith snails and blue legged hermit crabs in there. my line of thinking was they could control any detritus build up and trouble algae that accumulate in the fuge, or will the added ammonia and nitrates from the animals defeat the purpose? and excuse my ignorance but will the crabs eat the chaeto? any thoughts would be appreciated. Thanks tank homies!