All three are alive and well, thanks! I still haven't seen them eat (I've tried them on algae wafers, bloodworm pellets, catfish pellets, flake and prawns so far) but there are bare patches here and there on the glass, and they're so small, they probably only need a tenth of a gram of food, between them! None of them look hollow bellied at all.
I'll put some pics up tomorrow, but I've moved the tank around a bit (carefully!) and put a black backing on as well.
I'll also be going back to P@H to get some more early next week; don't want them to sell out and get another batch of, knowing my luck, totally different species in!
I thought I'd get one more 'spotty' and two more 'stripy', so I have three of each