HI, I picked up a royal pleco a few days ago and he is cool. Im pretty sure he's a L-190. I went into a fish store and the guy told me to feed him zuccini and romanian lettuce. This morning, I cut off some zuccini and stuck it under the rocks, 3/4 of it is above the rocks. Now, how thin should it be. Im trying to get him to eat but all he's eating is the small amount of algae in my tank and I mean small amount. Plus, I want him to get big 