What's wrong with my favia?

[Jakepen]

I've had this spitfire for about four months. Usually he is one of my hungriest corals, always has his tentacles out, and was always puffy, and could see growth consistently. Lately he looks very deflated, doesn't extend his feeders, even can see his skeleton in one spot. Nothing has changed in my tank recently, except recent addition of a new six line. Have had some diatoms lately, so I know I have excess nutrients currently. Paramaters are, Temp: 79.5 Alk:8.5-10 dkh (range from dosing) Calcium: 450 Magnesium: 1400 PH usually right around 8.1. If anyone has any ideas, let me know what your thinking.

 

[Jakepen]

That last picture of the favia was taken this morning.

 

[1MJG1]

Looks alright to me, hahah I've seen worse. But if your getting diatoms, your phosphates are prob up which could mean he's ticked off a little, change out your rowaphos and see if that helps

 

[domination2580]

Diatoms eat silicate. So I'm guessing you have silicates in your tank. But that also depends on how long the tank has been up. Also if you have added any new silicates to the tank

 

[Jakepen]

Looks alright to me, hahah I've seen worse. But if your getting diatoms, your phosphates are prob up which could mean he's ****** off a little, change out your rowaphos and see if that helps

Well no he isn't suffering, but his behavior is very different. I can tell he is not happy, I suppose a rise in phosphates could be an issue. No excessive algae growth, although I do have a algae scrubber running in the back.

 

[Jakepen]

Diatoms eat silicate. So I'm guessing you have silicates in your tank. But that also depends on how long the tank has been up. Also if you have added any new silicates to the tank

I don't believe so. Like I said, just the recent addition of a fish.

 

[Jakepen]

Tank is a little over four months old

 

[domination2580]

It could be going through the diatoms phase of the cycle still