I've always had good luck with snails, so here goes... Snails will clean up any left over flake foods, work your algae and go looking for more. Suppliment their diet with algae wafer every other day, and once a week drop in a slice of blanched cucumber or zuchini. Take it out a day or so later before it can start to spoil in your tank. This will keep your snails on a varied diet, and they will continue to roam the tank cleaning for you. In a ten gallon tank, you're not going to have a huge algae supply growing on the glass and the plants, so supplimenting their diet every other day, or even every third day will keep your snails healthy, and keep them working for you.