Ok not trying to hijack this thread, but figured no sense in starting a new one given the subject and plethora of information in one thread.
Im seeing it again as well. The snails and tangs had mowed it down but now its coming back worse. Running GFO, replaced all of my bulbs with ATI. Params below
Phosphates 0
Ca 520 (currently dosing purple up)
Ph 7.9-8.0
Sg 1.026
Temp 76-77f
Light time: 12pm-10pm(2ea blue +), 3pm-8pm(purple+/aqua blue spl)
amo/nitrates/nitrites: 0
No filter sock, wet skimming seems to work well. Going to do a 15g water change tonight.
My alk was really low so Im adding some buffer to get it up since even water changes are not enough to keep my alk up. I figured with Ca being so high, my pH would be lower (prior to buffer).
I was running carbon for a couple weeks and that seemed to help. My RO unit is showing 4ppm tds now. Not sure thats right though since the unit is only about 5 months old and maybe had 200g through it. It shows tds even when there is no water flowing. I took the probe out and cleaned it then it shows 0 but then 4 when water starts moving both in/out of membrane/DI resin.
Also, My blue hippo has ich so Im trying to minimize what steps are taken and trying to let this level out on its own since Im dealing with a couple problems at once. Based on the params and light cycle, what would you guys suggest as the first step?