I have a 20 gallon tank and I have 2 yellow snails and 1 blue. Now I have plants in there but they are eating them. There are other fish in there but I was wondering what could take their place or how can I feed them so they do not go for the plants so much. Its looking bad in there. I do have things in there that needs a small mouth to clean. My betta is currious about little guys though and accidently killed one. So any help guys? Thanks 
