Exactly what the title says. Left for walmart for an hour and came back. Swimming upside down, darting into liverock and dang near dead. Water was cloudy yesterday with white long slimey stuff from canister. Did 40% water change and everything was fine last night and this morning. Go out to buy stuff and come back and found this. Protein skimmer is haywire - foam took the lid right off and all over the place.