So my nerite snail managed to get itself into the impeller? I think that is what its called. I have a filter that hangs off the back. The plastic tube that sucks the water up has a sponge around it. The rest is just clear plastic that leads into the filter. Then the impeller part (the part the spins) is capped by the end of the plastic tube. Hope that made sense. There is no where for the snail to get in, no gaps or anything. I do not know how in the world he got in there but it made an AWFUL noise! Sounded like rocks in a blender. I of course freaked out and immediate unplugged it. Took it apart and there is my poor snail. He was sucked back into the shell as far as possible. The edges of his shell are slightly chipped and the edges of his foot are kinda torn and not smooth . I feel so bad for him. Is there anything I can do for him? Any ideas how in the world he got in that part of the filter? Thanks.