I have been putting blanched zucchini in the tanks but it doesn't last long. 24-48 hrs for 1/6 a zucchini, some tanks are getting 2 chunks. I also put raw pasta for them. They seem to do best in the tank with the salvini. That tank stays dirtier than the rest. I have moved most of them there. I just sent about 20 over to Denver tank collector to send out in tanks that are going for local schools. That will help some. I still have quite a few more than I want and we are just going into breeding season.