What kind of fish do you have? You could just give them a squish and let the fish have at it.
4 Tiger Barbs
2 Blood SwordTails
1 Pleco
2 BLue Coral Dwarf Guoramis
6 Neon Tetras
4 Black Phantom Tetras.
With those fish, a little squishing and cutting back on feeding will help a lot.