I was looking at those pleco wafers when I was trying to find a test kit yesterday. Thought they would be good for the OTOs but the ingredients list started with wheat and soy and some other wheat then some other filler stuff. I ended up not getting them. Even the algae wafers from hikari have alot of fillers in them however they do seem to enjoy them sometimes.
Everyone loves the zucchini, noone touches the spinach. Ill have to try the canned green beans.
I also make some of the repache (spelling) green, do a flat thinner wafer then freeze it in a zip lock. Break off a piece every once in a while. They seem to eat it ok.