Once your fry get bigger, call some local fish stores and see if any of them would take them - Nature will cull the weaker ones and be sure to cull the deformed ones yourself (if you have any) - Although convicts are common, sometimes the lfs don't order them but will take free ones. Sometimes they will even offer you a discount if you purchase something on the spot - often they will just take your fish and not offer anything so don't expect anything back. If you bag them 2 at a time using materials from the lfs themselves, they greatly appreciate it and it increases your chances of doing future *business* with them.