My pond is new but I have found that Purina Aquamaxx starter and Optimal Jr. have worked well mixed for me. FHM and some of my CMBG love it. My larger RES and CBNG, seem to really like the Optimal. I plan to swap to Optimal Jr and Optimal BG, when I run out of Aquamaxx. FHM really cannot quite get the Optimal Jr, it is just to big. I like feeding them because my redear really get after them when they feed.