Woke up this morning an everything in my tank was wiped out, clown fish, green chromis, yellow chromis, an hermit crabs. Took my water to get tested and everything was perfect!! My only other guess could be some type of parasite that could have caused this. Ive also heard about stray voltage, i have a 5 gallon. Anyone know around what voltage is approate to have? Im running a mini heater an a small pump for extra flow, the tank is a marineland hex5 which runs a internal filter. Need to know what to do in order to start my tank back up again with out any probs. thanks