I have a 55 gallon tank with guppies, blood eyed tetras, danios, 2 yo-yo loaches, a school of neons, and one red wag platy. I want to add one pleco and some ottos. The last addition I want to add is ether a clown loach, or some snails. I was wondering if I could add both so what type of snails do clown loaches eat and if there is a type of snail that clown loaches don't eat, please tell me. Also, how big will clown loaches get and will they every get to big for a 55 gallon?