I have never done anything to the lettuce missymoo. My wife was buying bags of pre-cut salad and using the lettuce in the snails bowl (at the time, they're now in my 10 gallon hospital tank). I went with her last grocery trip and did some price checking and found a head of lettuce was much cheaper and lasts longer so we've been just peeling a leaf off at a time and I put it directly in the tank. Once they catch it, it disappears fast. Kyle
