What is killing my coral?

A

Ajholms0427

Member
Recently I have been having problems with my hammers, frogspawn and Duncan's. All other coral has been and is doing fine. I haven't changed anything in my routine, haven't started dosing anything new and I don't see any fish harming them. I do have a pair of clowns that refuse to host my bta's and host a couple frogspawn, but not the others. It's every piece of the mention corals (frogspawn, hammer, Duncan) that I have. One wall hammer and one Duncan I believe are beyond the point of saving, so I want to figure out what's wrong before the rest take the same path.
 
post pics! what are the symptoms, what are the complete parameters of the tank, what sort of inverts do you have, when was the last water change, lighting, flow, and how long has the tank been up?
 
How are your nitrates? What's the water temperature? I once had a huge nitrate spike and all my euphyllias closed up completely until I got it under control. Took weeks for them to come back. I then had a heater fail on me and the temp dropped and again, same thing.
 
Here are my tank parameters.

Temperature: 78 degrees
Salinity: 1.025
Calcium: 425
Alkalinity: 10.2-10.4
Magnesium: 1480-1520 which I know is a bit high.
Ph: 8.0
Nitrate: 25 ppm which I know is high
Phosphate: 0.03 or lower

Last water change was done Monday and I will be doing another one tonight.

I will be posting photos in a bit.
 
As far as flow I am running two wp-40 one on wave 1 setting one on else. I have t-5 lighting the same way for 2 years. The only inverts I have are hermits, a few snails, a cleaner shrimp, 2 fire shrimp and a pair of harlequin shrimp.
 
I have been heavily spot feeding these corals every night and they seemed to be doing a little better except for my one hammer that is completely gone and will most likely be removed tomorrow. I will also be doing another water change tomorrow to get whatever death that is in the tank out, making it my thrid wc this week.
 
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