Been a while since I updated - have been super busy with work and traveling almost every week.
Unfortunately, having some major issues with the tank right now. Seeing random corals with what seems to be some kind of infection. It's not RTN or traditional STN, although it's turning into STN in some cases. In many cases PART of the coral starts to look bad and then it spreads. In some cases things are just kind of turning brown and grumpy before eventually giving up.
I can't really figure it out - things I've changed:
1. swapped in some non ATI T5 bulbs I got on sale. These are actinic bulbs with (apparently) a heavy UV spectrum. Given that only some corals are impacted, this doesn't feel like the problem but I swapped back to the old ATI bulbs just in case.
2. Used a box of old AF salt after many months of using IO. Have since swapped back to IO and performed some water changes.
3. Stopped/started vodka dosing. I can't imagine this made things that grumpy, as I've done this in the past, but it's worth noting I guess.
Here's an example of what I'm seeing:
Bottom left of the coral looks great, top right is clearly something going wrong. This will spread.
Same thing on the fox flame - you can see the grumpy infection starting on the right. Other parts of the coral look fine:
Here's a maleficent frag that was finally starting to branch, now it's browning out with burnt tip:
My oregon tort has some weird, bumpy flesh:
Froot Loops turning brown with thinning flesh:
I suspect it's bacterial simply because I would be surprised if any minor changes in lighting or water chemistry are causing this. It very much has "infection" vibes to me the way it spreads around. Some rocks are impacted more than others - I lost every single coral on a specific rock, and it seemed to spread from there. Some parts of the tank are totally unaffected (so far...).
ICP results are all totally normal, have continued doing those monthly. Just going to try and ride things out and stay as stable as possible for now.