Well, they've grown a lot since we first got them (according to both my boyfriend and the Petco guy when we took back Banana for harassment). Only 'injury' type he's had is finrot and ich. Stress could potentially be attributed to Bowser, but Moon's picked on the most, which is odd since the guppies tend to pick on Pink and Moon's totally ignored for being the ugly guppy, but the betta picks on him the most? *Shrug.*
Fluval Chi: Freshwater setup, home to a double tail plakat and a hunted colony of copepods. the guppy thread! 30+ pages strong!