Wow nice tank and sorry about your issue. So it looks like one of those that sort of plate as it grows and then covers the rocks like in the first picture.
The only other tank I can think of that had that much algae growth was HDTV"s FOWLR tank and that was because he wanted it and not plain gray rocks.
So what to do right?
First I am suprised since you have T5s running. Many people say that CA has a harder time growing in bright light but this does not seem to be the case.
Thanks for your reply, Yes I am running T5HO 2blue 2white Recently I tried running only 2 white. Hope the CA stop growing, but it won't work.
The other is do you know your Mg level? When people report their CA is dying and turning white their Mg is usually very low like 1100 ppm or less.
My Mg at 1200ppm
On the rocks that you can remove can you take a screw driver, razor blade, dremel tool and cut it off?
Yes, I think this is the final thing that I need to do.
As far as how to remove it otherwise long spine urchins will eat it. Can you get them in Malaysia?
Sure, But that urchin will grow very big with that kind of long spine in my 2ft tank. I don't think I like it so much.
Also are you doing for Ca and Alk or are those numbers just in that range?
I add kh buffer or Mg buffer when I do top up water.
Finally does it look like every colony is being affected or just luck of the draw?
From the picture you can see all the plug and also the live rock infected.
