So I wake up this morning and one of my africans was dead. Had him about two years. The day before he was swimming around happily. The night before I was setting up my new tank next to it. I slid his tank over a couple times to get it out of the way. There was alot of movement and vibrations around the tank because we were carrying everything in the house and pretty much having a small party last night. I'm thinking it just may be stress. Hopefully when I get home the other fish are ok. 