offered zucchini to the rubberlip pleco and he could not be bothered... want to try some for the bn and the otos... they were out of zucchini so I got cucumber. I will peel it. what about cabbage? spinach? lettuce... not nec romaine... what else? how long to leave it in there? I have a veggie clip and we use sinker weights for the zucchini/ cucumber.