Hi all. We have the pond, and the sides get grimy. We have a huge apple snail in our 180 (about the size of a tennis ball or so) and we were thinking about getting some for the pond. But would Guido, the amazing, cutest-ever red-tailed catfish, eat them? I wouldn't think they'd LOOK tasty, but I know his and my ideas on what is tasty are probably different. He's about two feet, but if he'd eat them at four feet, I'd want to know anyway, so what do you think? They aren't especially cheap, and I don't want to watch them disappear. Any of you had your RTC eat snails?