Montipora suddenly lost color?

[DiscoMush]

My montipora has recently lost all its color and started to turn light grey. I can still see the polyps but they’re retracted and it seems the algae on the coral is gone. I noticed this a few days ago and did a dip incase it was a pest but it seems like it’s doing worse now. All other corals in the tank are thriving, so I’m not sure what’s wrong.

Parameters are as follows: 0/0/5
Lighting is an AI prime 16

 

[Spare time]

What do you mean by parameters 0/0/5 ?

 

[Spare time]

Also, considering it is below some zoas that are stretching for light, I doubt it is getting enough light.


Do you feed the corals?

 

[DiscoMush]

Also, considering it is below some zoas that are stretching for light, I doubt it is getting enough light.


Do you feed the corals?

0/0/5 is my water parameters for ammonia, nitrite, and nitrate
In the photo I actually recently just moved those zoas because I saw it was stretching for light from the side it was originally on, and I had moved the montipora closer to the bottom since I was worried it was too much light. It was initially near the top of the tank around 12 inches below from my AI prime

I do feed the corals reef roids occassionally, but recently in the past two weeks or so I've only been feeding my fish frozen foods/pellets

 

[Spare time]

Ah. Do you have a phosphate test? I saved a bleach coral once. I fed it reef energy daily and dosed phycopure zooxanthellae.

 

[chipchipbro]

i do have the same issue and ai assume its due to phosphates are 0

 

[DiscoMush]

Ah. Do you have a phosphate test? I saved a bleach coral once. I fed it reef energy daily and dosed phycopure zooxanthellae.

My phosphates are currently at 0.04 (13 ppb with hanna checker). I also checked KH and while it's a bit low at 6 dKH, it was at that level before the montipora began to fade. Would you recommend to start dosing first? Or try feeding my corals with reef roids first? It's only a 20 gallon so I'm worried I'll overdose with the phyto