Acropora tip burn

[Delphinus]

I'm working on raising Mg. I think Mg is closer to 1280 right now. Isn't seawater at 1300? So this damage can be low Mg??

I forgot to list Potassium. I did test for it and I *think* it's between 350-400. (Extremely hard to read test results..)

[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.