Thank you so much!Yep looks exactly like it. Beautiful tank btw.
Here's a FTS
Been running so good for years and then this! I also believe this produces toxins which inhibit growth of corals and coralline! For the last 1 year growth has halted and I have a huge CalRx.
My current plan is to carbon dose and lower nitrates to below 10. Also running GFO from last night to lower PO4 further. I don't mind it hitting 0. Then I will decide the next steps..
1. Cyano treatment
2. Azithromycin (as i am super frustrated at this point)
3. Major water change ($$$$$$)
Here are some more pics