Most
LFS (non petsmart/petco places) will take fish for store credit. You just have to grow them out until they are at a sellable size.
My
LFS will accept fish regardless of sellability. They have 5 or 6 20g tanks reserved for ppl who's fish got too big, or who are moving and can't take their fish along. But then again, i have a really awesome
LFS.
I would ask around before i had 20 juvi discus to deal with
