RTN got one help me keep the rest alive

I have pretty much given up on the coral. Maybe it will make it. Maybe not. I have a lot fragss in a buddys tank I am gonna wait a long time before I move them over. I have a clown, a firefish, a damsel, and a cuc in the tank now. I was planning on adding some more fish. But I will wait until the end of October before doing so. I will wait until thanksgiving before trying coral again. And continue to do weekly 5 gallon water changes.

Does this sound like a plan to yall thanks for the help.

 

To get your alk (dKH) balanced, you will need to be testing for MG. MG is the element responsible for balancing the CA and dKH levels.
Your PO4 is high enough to damage SPS. Mix that in with the dKH problems and that could be the root of the cause. Your flow is on a lower side, but I don't think it's low enough to cause too much harm, depending on where exactly the corals are.