Eating my coral?

[Frogger]

Your corals that photosynthesize require both nitrogen and phosphorus at a specific ratio to complete the process. If one is limiting the process is stopped or reduced. This will cause the other one to artificially increase because the zooxanthellae, algae and other photosynthesizing organisms don't have enough of the other to continue. Your tank may not have 0 phosphates however any new phosphates that are added via food, additives or fish poop is quickly used up.

This sounds like it is a distinct possibility in your tank. You have enough phosphates to keep the corals alive but not enough to use up the nitrogen or to make your corals happy.

SPS are the most affected because zooxanthellae are their primary source of food.

[tang daddy]

I would try to feed more to get the Po4 up. Last I checked my po4was .11 and sps are thriving....

My success is mainly due to the heavy feedings with a ton of fish.
I haven’t tested nitrates for awhile but I assume that it’s over 10.
I may do a large wc this week to reset the Po4 to half but reluctant to touch anything while the tank is thriving.

Try feeding more and see if that helps your sps!