I have a turtle tank containing a messy Texas Map turtle that is not particularly interested in eating live fish, so I put a lot of Cory catfish and algae eaters in to clean up after her. Some days, Tex is not hungry, but the scavengers are, so I give them this. The pellets sink, although sometimes not immediately, and the bottom feeder really like it. I also put a tiny hatchling stinkpot turtle in the tank, and it really likes it, too. It has really grown since I started feeding it this.