Hi all. Got a fairly new tank of 4 weeks. Have 5 guppies and 3 neons all fine sofar. I bought a 'flying fox' 2 days ago ( type of barb?). This morning, oh dear, it was dead outside the tank!! There are two spaces in the back of the tank lid for electrics etc. He must have got out there. I'm amazed he got out. Anyone else had this problem? 