Bad bacteria is the cause, but not the root. Stirred up a DSB lately? Carbon dosing along with a bio pellet reactor? Do you think your tank has swung to overly bacterial?
Their conversations revolved around guys stirring up DSB's which resulted in a bacterial bloom and STN (across the board). So it's not bad bacteria per se, but too much of it. So, that and the bacterial driven systems of this era seems to provide a commonality with people's experiences.
I use red sea and API test kits. I did the test mainly for testing for heavy metals, but the test shows 0. Which is good and rules out heavy metals what is causing STN in my tank.
I still don't know whats causing the STN on most of my corals, maybe its bad bacteria?
No temp swings, I use an apex controller. Alkalinity stays between 8.6-9, salinity always 1.025, cal is 480, N03 is 0, PH 8.4. I was using bio pellets but took it off about two weeks ago.
I don't have a DSB, its almost BB tank. For flow I use a RW-15 and Maxspect Gyre XF150 with Gyre Interface module. Salt mix I use is Tropic Marin Sea Salt.
The few of the corals that are doing great are: UC Shortcake, ORA "Tricolor" Valida, Leptastrea, Hammer, Lobophyllia, Zoanthid, Ricordea Yuma.
The some of the bad ones are: all of my 40 acans, Duncan, candy cane, Monti, ORA Ant, Pocillopora, ORA "Stuber Staghorn", ORA "Green Planet Acro", Strawberry Shortcake.
I also stop using GFO for now just to see what happens to the corals. What hurts me the most is losing my acans because most of them are rainbows.
No temp swings, I use an apex controller. Alkalinity stays between 8.6-9, salinity always 1.025, cal is 480, N03 is 0, PH 8.4. I was using bio pellets but took it off about two weeks ago.
I don't have a DSB, its almost BB tank. For flow I use a RW-15 and Maxspect Gyre XF150 with Gyre Interface module. Salt mix I use is Tropic Marin Sea Salt.
The few of the corals that are doing great are: UC Shortcake, ORA "Tricolor" Valida, Leptastrea, Hammer, Lobophyllia, Zoanthid, Ricordea Yuma.
The some of the bad ones are: all of my 40 acans, Duncan, candy cane, Monti, ORA Ant, Pocillopora, ORA "Stuber Staghorn", ORA "Green Planet Acro", Strawberry Shortcake.
Do you have any algae issues? If not I would also considering some amino acid supplement as well as a more particulate focused food (LRS Reef Frenzy, Rods, etc.). What type of lighting are you using? Have you made any lighting changes recently?