Branching corals always turn to slime

[FTony]

I'm looking for some help.
I love the branching corals, hammer, frogspawn, torch, etc. But each time I try to put one into my tank it turns to slime in about 2 days.
At first I thought it was from the shipping but this weekend I coughed up the money to buy some locally. Sure enough, the hammer slimed on day one and I lost one head of the frogspawn today.
I am putting them into a 24 gallon AP with PC lighting about 4 months old. I have many zoas, a pearl bubble, ricordia and candycane coral all doing very well in the same tank.

I have the stock pump and added two other micro powerheads with hydro flos in the tank for flow. I am also using a sapphire protein skimmer.
The tank parameters are as follows: SG 1025, ammonia 0, nitrite 0, nitrate 0, ca 640, alk 12.5 dkh or 4.4 meq/L and ph 8.2
I know the ca is too high but I do not add anything to the tank. I think it is from the salt mix (coralfe). However, this is the same salt used by the LFS I bought the most recent frags from.
I would really appricate any advice. I still have one head of frogspawn left that I would like to save. Also, I do hope to be able to keep these corals alive someday, as I think they are the most beautiful. Thanks.

 

[2crazyreefers]

These corals do best in little flow IMO. Do you have too much direct flow on them ?

 

[FTony]

I've tried both low flow and direct flow. Low in the tank and high too.

 

[Surfzone]

are all these corals comming from the same place? if so then it sounds like they may have something in their system. I've posted my Iodine dip on new corals in a few other threads, but that may also help you out.

 

[blange3]

What is the temperature? Does it vary much?

How are you measuring the SG? What kind of test kits are you using?

How do you acclimate the corals?

I would stick with low flow and if you are using a swing arm hydrometer I would check it against a refractometer.

It is possible that some parameter has gone out of whack since your last successful coral introduction. The existing stuff has adapted, but it is shocking the new ones dramatically.

 

[duec22]

<a href=showthread.php?s=&postid=8945521#post8945521 target=_blank>Originally posted</a> by blange3
It is possible that some parameter has gone out of whack since your last successful coral introduction. The existing stuff has adapted, but it is shocking the new ones dramatically.

Ditto..