If past notes are taken it might be good to revert to those conditions where everything in the tank seemed to prosper and flourish.
I myself tend to try new changes with equipment, salt, additives, new ways of doing things I read from time to time and find myself regretting it. Might not show right away, might be a month or two down the road, but I start to recall when I kept things a certain way, and that things were doing awesome, and though, mostly because of the cost for equipment/supplies/high-end salts that I have purchased might go to waste so I try to hold onto to the new regimen, I always revert to the way I did my reefs that was always successful for me.
That is what I am in the process of doing now. reverting to the old ways that worked for me and my systems.
I am phasing out the new things I have been doing. Growth has not been satisfactory for me but according to notes and old pics it seems that the way I used to take care and run my reef tanks growth and condition was always phenomenal.
Why do we always tend to change things when they are going just fine the way they are I wonder?