So I found a dragon guppy tank in a small fish store one of the male guppies had a cut on it's stomach with a Little bit of it's guts hanging out and it also has a rip in it's tail but it's not that bad. The store owner was going to throw the live fish in the trash so I bought it and I have no clue what to do it's hiper active and loves to eat but it's injury is kinda concerning and so is the way it's swimming I already have two 5 gallon aquariums but I've never seen any of my fish continuously dash around like that... So it'd be great if I got some help.