We have been having a problem with trumpet snails... To say the least! I tried setting out homemade traps, regular water changes, decreasing the amount of food,... We tried lots of things. I decided to go get some assassin snails. I started out with one, and it completely disappeared. I went and got four more... But now all there are is empty shells in the tank. Will bichirs eat assassin snails?! Has anybody else had any trouble with this? And if so, what's the best way to get rid of these stinkin trumpet snails?!