My new office mates! (Who wont stay still for a good shot.) I bought a twenty gallon fish tank about a year ago and I’m only just getting it up and running now. Sadly, I’m told that the first few fish in a new tank aren’t fish at all, they are sacrificial lambs giving their lives to stabilize a new tank for the fish to follow. So, for now, just these few danios...I do hope they make it.