Well i have had a lot of problems with algae lately and I tried using some mystery snails and ghost shrimp to take care of that but it still has not worked. The shrimp I thought wouldnt work cuz they arent great algae eaters, but they ate a lot of scum off the gravel. Anywayz... the mystery snails ive read about eat a lot of algae. There are these big patches of brown and little dots of green all over the place. Anybody know why these snails arent doing their job?? Thanx.