Sorry guys more about my fahaka. My guy has been devouring shrimp, crayfish, smelts, ect ect no problem since I bought him well over a year ago. For the last two weeks he will only eat frozen crayfish, which would be fine if I was not almost out of them and have a really hard time finding new ones. She just begs at the glass for food, but will not strike unless its a cray. Anyone every experience this problem? He is in great health. The only thing that has changed over the last couple weeks is my water change schedule. I went from a once a week 25% water change to two 25% changes per week. Any thoughts? Any crayfish whole sellers?