Acropora tip burn

[niloc16]

i'm not sure if mg would be the cause. but its worth a try to bring it up

[Snappy]

Tony I see recession at the bases too. I think there must be something toxic in your water or the air getting pumped into the system.

[Jason McK]

I agree with Greg. I'd run some Carbon and if you have a UV get it going. Do you run Ozone? or any bacteria based addatives (Zeovit)

J

[Reefer Rob]

Are you running any nitrate reducer or chemical filtration? Some of these will strip the water of trace elements. Just a thought.

[Delphinus]

I am running carbon now.

I don't have a UV. If this was your tank would you consider buying a UV? Or ozone? ..

I was running Zeovit for a while, also ran Reef-resh before that. Not currently running either of those at the moment though. But I am using Taylor's "NO3 Destroyer".

I did in the past try a sulfur denitrator on this tank, but it never worked, so I gave up on that idea. That was nearly two years ago, would there be any residual sulfates? Even if there were, I thought they were supposed to be inert?

Throw some polyfilter into the mix maybe?? If it's something toxic I don't know what else I can do. Basically all I can think of is things like Chemi-pure, copious carbon, and polyfilter. I guess I can try UV but I don't just have the understanding behind it to know what size and flowrate to look for.

[Samw]

I had the same problems in the past. Things turned around for my Acroporas when I started running a UV while all else stayed constant and I was finally able to keep Acroporas alive and growing for about a year. Then, they started slowly dying again. My theory was that some kind of bacteria/vibrio was killing them and the UV sterilizer helped. When I neglected to change the UV bulb, the bacteria came back and I slowly lost all of my Acropora.

[fencer]

I prefer ozone because it will also take out any (some)toxins UV is only biological. You didn't say if the pieces died eventually or they just suffered that tip burn and lived.