Duncan been closed for a month

[Benji k]

My Duncan had been closed for about a month and my parameters are
Salinity 1.027
Ph 7.8
Nitrate 1 phosphate
Phosphate not certain but around 0.2
Calcium 444
Alk 7.9
Magnesium 1602
I also have a lot of Cyanobacteria tank has been set up for about 1.5 years most the other corals are looking ok 10 gallon tank
I’m not sure how to put in a picture but the Duncan basically has no polyps sticking out anymore but it still has its colour

 

[*GAREEF*]

I would bring up nitrates to 10-20
Phosphate 0.05 - 0.15
Lower salinity to 1.026 with a water change 25% once a week. Maybe add some GAC for a couple of days in case something nasty got in there.
Siphon cyano during water change.
It will clear up in time.

 

[Benji k]

I would bring up nitrates to 10-20
Phosphate 0.05 - 0.15
Lower salinity to 1.026 with a water change 25% once a week. Maybe add some GAC for a couple of days in case something nasty got in there.
Siphon cyano during water change.
It will clear up in time.

Thank you I don’t have like anything to raise my phosphate and I don’t have fish right now can I ghost feed to get nitrate and phosphate up and I’ll test my salinity after the water change and also what’s GAC

 

[*GAREEF*]

Thank you I don’t have like anything to raise my phosphate and I don’t have fish right now can I ghost feed to get nitrate and phosphate up and I’ll test my salinity after the water change and also what’s GAC

Yeah but not sure how long that would take and decomposing food could creat other problems.
Order some phosphate and nitrate.
GAC is granulated activated carbon.