Hello,
It looks like I have joined the club...I think I have Dinoflagellates.
My tank is 120g, that I setup in Nov 2020, and it cycled in Jan 2021 (4 months ago). The tank as 4 fish (two clowns, one blenny and one Coral Beauty) and 4 coral frags (GPS, Chalice, Candy Cane, Monti S). The tank was started with dry rock. In February the LED lights (Noopsyche K7 Pro) we setup on their LSP/SPS settings. The filtration is primarily a skimmer in the sump. My LFS had advised me to dose Seachem Stability for three months after the tank cycling, so that stopped 2.5 weeks ago.
Approximately a week ago, I noticed an area 3" round of what I believe is Dinos on the rocks on the other side of the tank from the powerhead(brown stringy algea looking with bubbles that grows during the lighted period, and seems to shrink back over night). The area has grown about an inch in the last week. I added more movement in the tank with a IceCap Gyre 4K on the opposite end of the tank, and a Aqueon power head at the end nearest the dinos.
My tank have been running with Nitrates 0.0 and Phosphates 0.0. Calcium 460-480. Magnesium 1360. My testing is using Hanna UL Phosphate, rest is Salifert. (my testing confirmed by LFS every 2 weeks) My LFS has advised me to feed the fish more and more often to raise the phosphates. Nitrates are still 0. Phosphates have jumped from 0 on March 15, .20 on March 25, .42 on March 30 and today .31. LFS also recommended dosing Red Sea AB+ which started 3/28.
Having read maybe 100-150 posts and multiple threads on this site concerning Dinos, I am planning to start dosing Microbactor 7 or Vibrant (have both on hand) and dosing ESV B-Ionic Nitrate (picking up tomorrow).
Will be changing the tank to only blue light and less hours starting with tomorrows cycle.
What am I missing?