I know It was talked about many times already, still I cant solve the problem.
Have purchased Hanna for phosphates lately and reading is 0.02. So my concern about having elevated P are not valid anymore. Scrubber is doing its job !
Nitrates are also undetectable. The only problem that I feel I can have is that maintaining stable Ca and kH is very hard due to small water quantity and high coral load. Ca jumps sometimes in 380-500 range and kH 7 - 8.8. This is better lately too as I got dosing equipment and it is finally tuned. All mentioned above does not harm SPS growth rates , only color. I was about to start blaming instability, but remembered that all corals browned in few days after introducing in to my tank . So they had no time to feel any instability at all in such short period.
Other bad effects that I have in tank are week coraline growth (almost nonexistent) , some zooanthids and mushrooms dyeing whatever I do , snail death (introduced 7 - survived 2).
The most thriving animal in my tank is pink birdsnest . Least brown and most growing.
On the right side are few acros. One should be green and others blue. All brown ...
Please share your ideas. I cant decide which direction should I try to change things.
I have very small amount of carbon, purigen and P remover in back chamber but not exchange it very often. Whatever I have tried - nothing made any difference yet. That leads to idea - I never did the right move yet.
p.s. forgot to mention brown film on all glass has to be cleaned every second-third day .