I've had my common pleco for about a year and a half now. Unfortunately I was fairly ignorant until about 8 months ago & was just feeding him algae discs. Since then I've been feeding him sinking carnivore pellets mainly & the occasional algae disc. I've been trying to get him interested in veggies, but they're just ignored. I put cucumber/zucchini in & replace a slice of it every 2 days. It just goes untouched. Is there something I can do or do I just have to keep it up? None of my fish seem to pay any attention to it.