I got a sea hair on the weekend and he just about eat him self to death.
The PO4 was coming from the frozzen food. I'm back to working dayshift instead of afternoon. I didn't know to rinse the food. I was putting one cube in a cup with salt water to thaw then feeding half in the morring and half before work. I was only feed frozzen every second day. The tank could handle that but not every day. One more learning experiment by trial and airer.
Thank for the input and helping me solve my problem.