Hi everyone, I saw the Silver Dollar at my LFS. I figured I'd get it since I have a mostly empty 125 gallon tank. I wanted to see if anyone would know if the Silver Dollar would shoal with smaller ones. I have never seen a Silver Dollar bigger than 2in diameter at a fish store, this one is 6--7in in diameter. I wanted to get around 6-10 so they can shoal, but I don't want to do it with big one wouldn't shoal with them. I know they feel less stressed in bigger shoals. Wherever the Silver Dollar was, it seemed it was super stressed and kept bashing its face. Its upper lip is practically gone and flat. I don't want it to continue to stress out and bash its face again. I am willing to grow out a shoal if need be, but I have no idea how long it would take. I have a heavily planted 20 gallon with a filter for a 90 gallon where I can house them.