@hassen
I started off being depressed about it and thought it would never go away
I decide to throw everything possible at the problem
In hope of getting rid of it
Did a few things
cut my halide time Down from about 5 hrs to 1hr ( slowly bringing back 1 extra hour per week )
Introduced a phosphate and orca bio cubes reactor
Stopped feeding frozens and reduced feeding
started scrubbing rocks and siphoning the detritus out of the tank
Added prodibio bio digest and bioptim
my methods seemed to have made a big difference and now I seem to be at the end of the problem
Only downside is that I had to loose some of my corals as there was no way of gettin rid of the gha and they were dying slowly no matter what I did. This wasn't caused due to reduced light as my anemones and in affected corals are all good
Also lost a fish or 2 as I didn't realize they needed the frozen foods
I guess that comes with experience but glad my problem is gone and glad to start the new year with a better looking tank
Also tank maturity seems to be coming along much better which also helps
I guess the combination of a few things made the difference