What is wrong with my chalice corals?

[Tremor_Clown]

Hey everyone...

I have about a dozen chalice corals which I've owned for a few years now but for some reason a few chalices have developed tissue spots and bleaching.
I cannot figure out what may be the cause as this only occurs with certain chalice corals, other chalice corals in my tank are absolutely fine and growing well.
I haven't changed my lighting (400w Radium), flow or anything and my parameters remain stable due to dosing.
I am really confused as to what is causing some chalices to bleach and/or develop these light spots while other chalices are doing great.
All I can guess right now is either: too much light, too much flow or some kind of bacterial infection.

Any input is greatly appreciated!

 

[stunreefer]

I would start by double checking parameters against other test kit(s). Make sure Mg is within range, and keep an eye on Alk stability for a few days - week. If everything checks out it's time to start dipping... Revive (+Prazi), Interceptor, Bayer, Levamisole... pick your poison

 

[Tremor_Clown]

Thanks for the reply stunreefer. I've actually dipped the questionable chalices with Revive, Interceptor and Coral RX Pro. I'll check out Prazi, Bayer and Levamisole. I am honestly stumped how 3 to 4 chalices are bleaching and showing these white spots yet other chalices (right next to them) are growing great.

 

[stunreefer]

If you've already dipped, then I wouldn't worry too much about the other types of dips... million ways to skin a cat, kind of thing.

Levamisole is the most aggressive dip I use, when all else fails. It can be very rough on corals too, but you can bet that anything on it is dead pretty quick.

Unfortunately chalices can be touchy for no apparent reason, more so than most other LPS IME. Perhaps try moving them into very, very low lighting. They can survive, and even thrive in this condition, and it will help relieve stress. With that said don't move them around too much as it will just stress them out more. Good luck :thumbsup: