Hi, I posted before, I lost one that was so weak when I purchased that it literally couldn't swim away from the outlet filter, and I found it stuck against it. I was gutted and didn't know they could be so starved and weak. I had four, then bought four more from another shop that looked slightly bigger, the seven are now thriving and have grown a fair bit and look great. By the way I never spot them all at once, I need to rely on a teenager who will look for ages!
I put it down to one of those things and although not seeking blame, the initial shop shouldn't have sold them yet, as this was a move too far too quickly. Racing incident, I like that, but it does hurt.