Have had my 29 going for about 2yrs now. Well stocked with corals, 5 small fish, dozens of crabs & snails, 40# l/r 2" sand bed. Have 1-250 mh retro and 2 65w pcs. Beckett skimmer in sump with fuge with cheato. Mh runs for 4hr in the eve. I have just now started getting a red slime outbreak. Have not changed anything in the way of lighting or feeding in 6mnths. Any ideas as to why? Added 8 drops of Kent poly-ox this morning and now have a huge Emerald crab that I've had since the beginning croak over on me. I don't know if it was just his time but I doubt it- he's had enuff energy up till today to flip anything that wasn't glued down solid. Any thoughts welcome. Curt