Need help on corals!

[feel200]

Hi all

My reef tank has specific problems with leather corals (not open), duncans (not open) and tree or finger types of coral (melt within days). However, other LPS hard corals are doing fine, such as brian corals, Polyps, mushrooms, Hammer Coral, Bubble Coral, Grape Coral...

Do you know what is the problem here? Thanks!

:sad2:

 

[millertj]

Any chance that you are crowding your corals..perhaps the brain or hammer corals are putting out sweepers that are killing off your other corals...simply due to close proximity. just a guess.

 

[betamed]

Do you have test kits? What is your ALK CA etc..