Okay, I have about 4 pair of fish that breed non stop in my tank. Out of each brood, only 2 or 3 make it. Often none. I have tons of place for fry to hid, and it is a large tank. Once I was removing rocks to switch tanks (135), the mintue little ones hit open water, they were toaste. Anything under an inch was gone. Now when I had my Nimbos in the tank, they would eat up to 3 inchers