Older thread, but, we have a rainbow wolf fish, he's maybe 6-7", and he eats snails for us here. I haven't tried any bridgesii in his tank (because I don't want to risk it), so I'm not sure if they'd survive or not. Pond snails, however, have managed to lay an egg sack or two, and the babies haven't been detected by him yet, but they haven't been a huge help with algae in our tank. Granted, I sort of like the algae on the glass, it's about the only green thing I have in that tank... Lol. I just use a magfloat to keep the front clean.