I moved the circulation pump in my 16g a few days ago to help distribute the co2 better. Since I moved the pump, snails crawl onto the intake and die, but this only happens during the night. Each morning I clean off the dead snails from the intake, and the Sens go crazy for them. It's gotten to the point where they prefer the snails over their morning pellets. When I throw in the pellets, they swim to them, stare at them, and then they swim to the front of the tank and stare at me. The Sens wait at the front of the tank until I clean the snails off the pump, and then they rush to the back of the tank to eat as many as they can. The Sens only eat the pellets once they finish their escargot. I know this won't the Sens, but I thought this was an interesting behavior.