Very low nitrates and nitrites, corals acting weird

[coralalien117]

Hi. My corals have been acting weird lately, mainly my xenia now has white tips which im not sure if it is normal or not.
The Xenia's white tips only appear when the light is off, and it is still pulsing so im not sure.
My GSP has closed and will not open.
My Nitrates, Nitrites, and Ammonia are very close to zero.
Should I elevate them for my xenia?
I also used Chemi-Clean for a cyano outbreak, could that be the reason?

 

[Timfish]

Try doing some water changes and feeding your fish more. What else are you doing on a regular basis? What are the other parameters of your system? Chemi-clean likely kills beenficial stuff as well as the nuisance stuff so it's really anybody's guess how the equilibrium of your system has changed. Be deliberate with any changes and avoid using a shotgun approach.