Not all apple snails eat plants. But they are notoriuos for escaping, as are nerites. Nerites are the only true really efficient algae eaters. What type of algae and tell us more about your tank.
They're most likely canas which are often confused with the brigs. Canas are voracious plant eaters unlike the brigs. You can use this as a reference to compare your snail.The apple snails I am referring to are the ones that get the size of an apple.
The apple snails I am referring to are the ones that get the size of an apple.