bubble coral and frog spawn

[retin78]

hey guys. I having problem with my hard coral. wells LPS. I have a bubble and frog spawn. Those are the only 2 LPS coral I have. And today. suddenly I see it melting. the melting part is turning brown. I check my nitrate. it was 10. it's usually stay at 5 but lately I been feeding my fish twice a day. can someone have any suggestion.

nitrate 10 used to be 5
calcium 350 trying to bring it up. is been like that for a while.
amnonia 0
nitrite 0

 

[Sk8r]

Better to have:
mg. 1200
cal. 400
alk 8-10
0 nitrate/trite
0 ammonia
If magnesium is too low, hard to raise calcium or alk.
I use MH light. I feed my fish once a day, sometimes skipping a day.

 

[retin78]

I should buy a mg. test kits.
and yes I have MH lights too. I only feed it twice a day because my purple, powder brown, and hippo tang are about 3-5inches. And plus they have ick so I got to keep feeding them.

 

[frederickk]

Did you change anything lately? When was your last water change?

You can control your nitrate with a 20% water change and then see if it help.

I added up LR few months ago and my nitrate went way up (around 40) my frogspawn went the same way yours did. With a few water change and time it all cleared up and came back to normal. He's even expanding right now.

 

[MiddletonMark]

What is your alkalinity?

How long have you had them?

 

[NexDog]

I find my LPS very sensitive to nitrates. I only have brains though at the moment and they won't expand if nitrates get high.