Problem with my toadstool

[jkz2970]

I’ve had this toadstool over a year. It was growing very big and I had to clown fish that were using it as a home. I added GFO because my phosphate was high and it started to look horrible so I moved it and it rebound it. I stopped using GFO during that time. My phosphate increased again and I started using GFO and now look what it looks like. This picture was taken at night with the lights off, but you can see the necrotic or dead material in white. Should I frag it? Or dip it in lugo iodine. I don’t really want to stop using GFO

 

[Lynn N]

Leathers are you easiest barometer on your reef tank and issues. Mine is always telling me how things are going.

 

[jkz2970]

This is it during the day