its well know taht puffers feast on snails, but ive heard alot of different opinions online about nerite snails. Some say they are toast but many people give anecdotal evidence of nerites being "puffer proof" in reference to figure eights, unless the snail gets flipped over. Aparently the shape, size, and shell toughness of the nerite makes its very difficult for the figure eights to eat. This would be great seeing as that i could keep a puffer and let the nerites go to town on the algae, but i am scepticle.