mogurnda said:I'd say it depends on the tank and the algae.
For a bigger tank, a tang will do a very nice job on most types of algae. Including hermits and snails is a good idea as well.
For small tanks, snails and hermits are the way to go, and each has its own preference. Turbos and astraeas tend to go for diatoms and hair algae to some extent. Hermits will eat some cyano and hair algae. Hermits will also scavenge, helping to keep nutrient levels down.
If you have a serious algae outbreak, herbivores will help, but will not eliminate it IME. Good skimming, circulation, careful feeding and refugia all help.
If they have stopped moving for a long time, yes. People often post about snails mysteriously slowing down and dying, and I have yet to hear an adequate explanation. Some say it's acclimation that went too fast, and the snails suffered internal damage and slowly died. Another possibility is a toxic species of algae that knocked them out. Somemay starve because there isn't enough of the right kind of algae. All great theories, but I know of little data to support any of them.Mick411 said:thanx for all your help i was also wondering if the snails aren't moving is there something wrong???