hey all i bought 3 new geos today at $20 a pop, they are 5"-6". i'm housing them with 2 retic rays and a lima shovel nose. my first question is what are adequate foods for them, cichlid sticks? and my other question is 1 of them has a cut/gash on its side near the top of his body, since i have stingrays my only method of treatment will be salt and water changes, is there any other thing i could do? the lfs said if it dies i can bring it back for a full refund, but id like to keep it!