LPS dieing and SPS healthy

[EthanHawaii]

Hello, my LPS (frogspawn and Hammer coral) has been slowly dieing for the last 5 months. The first few months the corals weren't opening up fully and then the 3rd month it lost one head and now it's lost 3 heads. I'm not sure what's happening because my SPS corals are doing really well. I thought it was Brown Jelly Disease, but from what I've read BJD kills within hours or days.
What could this be?

Cal: 445

Alk: 8.6

Meg: 1345

Ammonia: 0.00

Nitrate: 0.00

Nitrite: 0.00

PH: 8.0



Thanks,
Ethan

This is my Coral now.


Here's my coral 6 or so months ago.

 

[Knighthawk]

My guess is you have stripped the water of everything. Start feeding more and see what happens.

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[vpoiu1263]

Agree, feed more to increase some NO3 and PO4.

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[EthanHawaii]

OK, I'll start feeding every day now.

Thanks for the replies

 

[lifeoffaith]

Yup, your water is too clean.

 

[steallife904]

I had this happen to me in the past. I killed off a 50+ head frogspawn I still cry about to this day lol. I am just now realizing that LPS in general do not thrive very long without feedings.

 

[Uncle99]

Yup, your water is too clean.

Agreed. Nitrate should be 2-5ppm and you don't mention phosphate, but should be .02 - .05 max.

Please ensure Alk remains 8.6 if that's what you run, at ALL times. A change in Alk more than .5 will make corals very unhappy.

What about light? That's the only food mine get

 

[steallife904]

Might be the wrong place to ask but how do you guys keep your nitrate and phosphates at those levels? I have been in this hobby for years and have had my ups and downs but the one thing I have never been able to do is have my nitrate or phosphates even measurable? Mine are either 0 or so low they wont read (using red sea test kits). Maybe this is why if I don't spot feed my LPS they start to go down hill but I can never get these levels up. If I skip water changes it seems to do harm. I do 1 5ish% waterchange weekly. Feed tank frozen at least 4 times a week and pellets in between, spot feed lps once a week with reefroids. Only skim and waterchange, no charcoal or phosphate removing etc...

 

[dkevink]

I wonder if lights too bright for frogspawn and hammers. Hammers will take s little more light, but frogspawn are a lower light LPS I have read. I have a 90 gallon cube mixed. I keep sps directly under lights and LPS on bottom and back of tank.