I use reef crystals and I don’t have a phosphate tester but I’ll check nitrates in a little bitYup a little more info is needed before we start makin guesses!
So if you could grab us some pictures of the coral that would be great.
Also:
The type of salt you use
Nutrient levels NO3/PO4
Anything besides RO that you toss into your tank?
The iodine was a good call but im afraid if it is BJD that doesnt do much...
If its polyp bailing... then we gotta start looking at the tank as a whole

. Once you start gettin corals its much more important to test weekly or even more...

