leather polyps turning white

[Jon Evans]

My leather's polyps turned white the other day. It does not seem to be as healthy as it used to be. It is on the bottom of my 75 gallon, and I have four t5 ho bulbs on my tank. What's the deal?

 

[reefer4sho]

how old are your bulbs?

 

[sir_dudeguy]

along with reefer's question, what are all the water params? Something could be out of line somewhere..