Why is that? I have had 2 pr. (false percs and pink skunks) for four years.
I've not seen any problems with them. Admittedly the ossies are in a frogspawn and the pinks are in a rose BTA but when I moved them into a bigger tank (from a 150 to a 200) I put the ossies in first to let them choose and they went straight to the frogspawn. It took the pinks nearly a week to go back to the BTA.
What are your experiences?