GSP closed up for a month

[Mat1018]

So my GSP have been closed for about a month now. They started as a small patch and were growing great. Then randomly closed up and haven't really opened but I have noticed they are still kinda spreading upward. Looking for any help. Been in the system for about 6ish months now.

I have gently brushed them off when I notice brown algea growing on them.

I have taken the overflow portion out and dipped them in hydrogen peroxide diluted solution for 5min.

Tank is about a year old and 100 gallons combined. Weekly water changes from 10-30 gallons. With Ro/Di, salt used is reef crystals.

Here are the tested levels as of today test kit used for ph and nitrate is red sea, all other test are salifert.
Salt-1.025 temp-79 ph-8.0 nitrate-10 po4-.25 ca-450 mag-1350 alk-8.6

Lighting is a kessil a360xe tune blue. 88% for 7hour period. 2 hour ramp up before and after. Light has been on the tank since starting the tank.

 

[Rocks reef]

Do you have just one a360x over your tank? What size is the tank?

 

[Gumbies R Us]

How are the other corals doing in your tank?

 

[56longroof]

Would low iodine levels cause this?

 

[Rocks reef]

It could sir, but it looks like he is doing weekly water changes which should replenish the trace amount of iodine.

 

[Randy Holmes-Farley Verified Community Expert]

I ever dosed iodine on my first tank and gsp never stayed closed.

 

[TX_REEF]

are all other corals doing fine? If my GSP close, it's usually because something is physically irritating them, or something in the water parameters changed suddenly.

 

[LPS Bum]

GSP does this from time to time. I’ve found it’s typically in response to an irritant. Such as another coral stinging it. Your parameters look fine, and the water changes should keep things in balance. A month straight of being closed up suggests it’s being bothered by another tank inhabitant.

 

[Mat1018]

Do you have just one a360x over your tank? What size is the tank?

Its a 93 gallon cube. Yes just one kessil over it with a reflector on it.

All other corals are doing fine. Its a mix tank but more heavy on leathers.

 

[Mat1018]

GSP does this from time to time. I’ve found it’s typically in response to an irritant. Such as another coral stinging it. Your parameters look fine, and the water changes should keep things in balance. A month straight of being closed up suggests it’s being bothered by another tank inhabitant.

Tank inhabitants are clowns, chromis, darts, and normal cuc. I haven't noticed anything picking at them. Occasionally I notice a turbo snails on them but they never stop they normally just passing over since being closed.