Any idea why my acans are dying

Sorry, I can't ever get the pics to be upright.
One acan is in the sand, one is on the left, one is completely in the shade dead center.
 
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Tank looks awesome! Everything I have read says to dip in revive and place in low light low flow to recover. Are you spot feeding the acan?
 
From my experience acans flourish when spot fed at least once a week. I know there are plenty of people who do not spot feed at all and have great results also.
 
Acans aren't that hard to bring back from the near-dead; I'm currently reviving a rainbow acan from a single polyp where I cracked the skeleton in half, right down the middle!

All of the advice given here has been pretty much spot on; acans are a particularly hungry coral, coming from an area of the reef with low flow (sometimes only ocurring with changing tides) and high turbidity, as organic sediments and food particles slowly wash through the water. For this reason, acans are all but indestructible if you put them in an area of low flow, indirect light, and give them access to food multiple times a day. Although they do respond well to spot-feedings of mysis and protein-rich pellets and dry foods, my favorite food for spurring on their growth is assuredly BRS Reef Chilli; it has a VERY fine particle size, and I'm able to add a lot of it many times over the course of a day without having any adverse affects on my water. When I really feed a ton of it, I have acans grow new heads just days after being fragged.

Regardless of which route you choose, lower flow, indirect light, and as much food as the acan will take should send it spiraling upwards and growing outwards pretty darned quickly.

Good luck!

- Ben
 
The red thing in the bottom right corner is a sponge. They aren't getting any better. I'm trying to spot feed them, but they just aren't happy.
 
If you want to bring them over when we do the light we can put them in the dirty clown tank and see how they do.
 
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