Last night a took a piece of raw zucchini, par boiled it and dropped it into the 29. This morning 3/4 of the 2" piece was devoured. "They liked it, they really liked it!" Especially the clown pleco, who was munching on it with vigor before I went to bed. The 3 Julii's were sleeping next to it this morning too. I left it in, as it looked fine, and will remove anything that left tonight.