Some Corals loosing Tissue

[ReeferTCG]

Hello all, I am trying to figure out why im 1/3 on cyphastrea and 2/3 on candy cane. Every other coral looks to be growing ok. i noticed cyphastrea loosing tissue and moved it to lower light but it got worse, candy cane teal on was receding a lot but might be improving. Pics of all other “harder to keep corals” that are doing ok. Any help would be apreciated

Params
Salinity 34 ppt
Phos .3
Nitrate 10
Alk 9.13dkh
Ph 8.1-8.2
Calcium 450
Mag 1320
Temp 77-78

 

[Jekyl]

Coral are always going to have a rougher time with a new tank. More chemical imbalances along the road to maturity. Also not mentioned would be lighting and flow as a factor. Parameters look good save phos being high.

 

[ReeferTCG]

Thanks!! I started GFO at 1/4 of the recommended dose, nothing was super upset due to the phosphates besides slow growth and not great colors.