When I picked mine up there were 2 in separate tanks, the one I picked had NOTICABLE difference to the other, mine displayed higher levels of red in the tail + and IMO looked stockier, the other ones I have seen have much less colour on the tail (pale orange) and more lines/dots near the caudal fin - my one does not seem to have as much at all.
I have mine on a diet of hikari pellets, and the occaisional prawn, although it is an algae eater it fails to show interest in algae pellets, but I see him 'kissing' the glass a lot of the time; as a result he earned the name hotlips :lol: