Acans dying fast

[jordan9095]

So I had a cyano problem that was killing a few of my corals. I took care of the cyano problem by reducing my light cycle, adding phosguard, and dosing a small amount of Red Sea No POX (1ML per day in 25g tank). This was two weeks ago.

Ever since adding the phosguard and NoPOX my acans haven't been happy. They are basically shriveled up all the time. I thought they would recover but they have not. The tissue seems to be receding quite rapidly now. There is a clear line of receding tissue and dead skeleton underneath/below. I've since stopped adding NoPOX but I'm not sure if that was the problem. The problem also seems to have started when they were disturbed one night (moved around by one of my fish or inverts). I have a flameback angel but haven't seem it nip on the acans.

I've killed other corals, but never actually killed an acan. Anyone have any ideas? They have been doing fantastic (one of my only corals with great growth) in the same spot for a few months. They were sprouting a bunch of new heads before this started to happen. I understand they may have been using some of the nutrients I've since removed from the water, but I wasn't expecting that to kill them altogether.

Any advice or insight is appreciated.

Thanks

 

[miPapareef]

What is your nitrate and phosphorus levels? Dosing NoPox and running phosguard can rapidly lowered your nutrient level. That and cutting the light is going to make a hungry coral.

I know my acans don’t looks well when nitrate gets below 2 or 3, and phosphorus is below 0.03.