Pavona and Cyphastera Help!

[Tigerchuffs]

We’ve got a small pavona frag (bottom right rock) that hasn’t been doing so hot for about a month or so. We’ve had it in the tank for 3 months and it was bright green for the first 6 weeks or so but then started slowly losing color. Our tank is a 17 gal and running a Kessil A80 as well as the stock light that came with the tank (aqua Japan) for extra viewing a couple hrs a day. Our cyphastrea (center on gravel) isn’t doing well at all, that happened after about three days in the tank, I’m pretty sure he’s a goner at this point. Our other SPS, a stylocoeniella, is doing great with no issues (top of middle rock). I included a photo of the whole tank set up in case anyone has any suggestions for placement. Current chem/parameters are:
Temp: 78*
Nitrates: 0
Nitrites: ~5 ppm
Calcium: ~440 ppm
Carbonate: ~200 ppm
Phosphate: 0
pH: 7.8
Salinity: 1.025

thanks in advance!!

 

[Daddy-o]

Need at least a little nitrate/phosphate. Carbonate???????
Cheers! Mark

 

[Uncle99]

Agreed with above, N should be 2-5pom and P should be 0.03 - .1 or corals slowly starve.
Also, Alk is on the high side at 200pm, let that fall to 140-150 ppm while you bring N & P up.

 

[Tigerchuffs]

Need at least a little nitrate/phosphate. Carbonate???????
Cheers! Mark

Carbonate = KH

 

[Tigerchuffs]

Agreed with above, N should be 2-5pom and P should be 0.03 - .1 or corals slowly starve.
Also, Alk is on the high side at 200pm, let that fall to 140-150 ppm while you bring N & P up.

Thank you so much!!!

 

[Tigerchuffs]

Need at least a little nitrate/phosphate. Carbonate???????
Cheers! Mark

Thank you for your response!