corals not opening

[ai[k²]wan]

any1 have any idea why my buttons and waving hand xenia not opening, other corals alright..

only few reasons i can think of is high nitrates, or some pest causing it.

budden even if high nitrates should still open leh..

[roidan]

button coral or button polyps?

if they are button polyps..they are generally one of the more hardy corals around...do a check on your water?

[ai[k²]wan]

zoanthids lor.. ya lor hardier ones.. my tank screwing up..

i do see web(thread) like thingy on them

[ah^siao]

must be stress...

[junyong84]

check water parameters!!!

[ai[k²]wan]

ammonia and nitrite 0 ... nitrate hehe.. nv test

[mAriNe_enthusiast]

I have a button that din opened up for so long...a mth i think.

I decided to move it to my spare tank with direct lighting but it just din open. I tried dosing DT directly but to no avail..

Dun noe if it's dead.

[FuEl]

My buttons and yellow star polyps and brown star polyps have onli been opening partially...

few days ago i added seachem's reef builder too rapidly..tink added 2 teaspoons of reef builder water-mix into my sump directly

Tink i was too tired to know wat i was doing.....

[ai[k²]wan]

did it start after u added reef builder?

[siglap]

check the calcium level. corals depend quite a lot on it

[james72]

check the calcium level. corals depend quite a lot on it

what should be the right calcium level for corals?

[siglap]

between 400-450 ppm