They had eleven total at the LFS and I wanted to get them all so badly, but I figured eight was more than enough for the bottom of a 45 gallon (buying five to join my three). I'll let you know how they come along, right now they're just relaxing in a QT tank and chirping softly.
They just arrived at the LFS today so I'm going to QT for a little while longer than usual.
Sorry to hear that, Lupin! My three had done some damage to my Dojo before I got them into a tank with barbs and some small lake t. cichlids. Now they stick to themselves.