Ive found documents that people had done with GSP and FEP (figure 8) that they didn't need brackish waters for a long life. It does help the fish but its been done with out brackish set up. Hmm the tail thing might be a problem with the betta. Or you can get a small GSP and once the tank is cleared of most of the snails... return him or put it up for sale.
Ive had good luck with wafers if u dont mind spending the money, if your fish don't eat it down.
Ive had good luck with wafers if u dont mind spending the money, if your fish don't eat it down.