i wouldnt worry my nerites are always on my heater especially if it has algae growing on it and they havent gotten hurt. heaters never get hot enough to hurt the fish unless there is something wrong with it
Thanks, guys. I didn't think there would be an issue. I saw a snail on it a month or two ago and I took him off thinking it would burn it. I was more worried about how slow he moves.... if it got too hot it'd take him days to get off it!!!! But I guess it doesn't get that hot!