ok i give up.. i have to start over..

[michika]

GFO - granulated ferious oxide, which is also phosban, phoslock, etc.

I would recommend keeping with the water changes, add in some new carbon, and be very careful about overfeeding. You can also trying blacking out your tank for a day or two. Cover the tank with a blanket or towels to ensure no light enters.

What do you have running in your refugium?