help! Acan irritated receding

[jimmy_beaner]

IME anything in a bag is a detritus trap. Long ago I used purigen in sump, but after using carbon and aluminum oxide in reactors, I wouldn't think of using anything in a bag. Bulk GAC will perform better than chemi-pure elite as the resin is essentially inerted in seawater. If you think about passive filtration in a mesh bag versus a reactor from a kinetic perspective, the media in a bag is doing almost nothing if it is performing mechanical filtration.

Have you lifted the hood to attempt to lower PAR if you suspect light shock?

Next time you change the purigen, shake the bag out in a clean bucket of water and you will see the DOM that falls out.

I have dimmed the LEDs down to 50-75% and reduced the photoperiod by 3 hours. I have also removed several bags of filtration (including the chemi-pure which was 4 months old and the Purigen).

 

[UKMarineGuy]

Did they survive?

 

[jimmy_beaner]

No, just slowly died. From additional research, it looks like the pinkness of the skeleton could be a certain type of infection that spreads across the tank.

 

[DEA Coral]

I have ten acan frags, they all like a good flow but not so much light. I use LED and all ten do not like the cool white LED. They do like the acnic lights...what I mean is if I only use one or the other they open with the acnic lights and not the white lights. Your lights could be too much for them. I read that another guy on here keeps his acans in the "shade" of rock and not under direct line of his lights. They may not like getting burned on bright lights. Note: I also only use half power on half the LED in my light set. Good luck and try acclimatizing your corals to your lights. Lower setting for a week and raise it each week; not every day in nature is a sunshiny day.

 

[jimmy_beaner]

I did acclimate them, over a period of several months. As stated, it wasn't just a light problem. That's how a healthy neighboring acan can go from growing to dying even though nothing had changed other than the neighbor showing pink skeleton.

 

[UKMarineGuy]

Hi,

Update from me

Im having exactly the same issues, lost 4 acans so far and about 80-90 heads in total. Tried everything with no avail, kept them for 4 years with no issues. Been chatting to another user on my local forum and facebook, seems that their might be a new paracite (pod based) from australia that likes to munch acans... With this i am trying a dose of Milbemax to see if this cures the issue. Ill keep you updated with progress. Ill need 2-3 doses, if this is a parasite then ill need to kill the eggs on dose 2 and 3.

Cheers,

 

[Chetna]

Im also curious if the white light is what is bothering them. Has anyone else had this happen with white LEDs.

 

[UKMarineGuy]

Hi,

Well the doses of milbemax saved the remaining acans. Within 2 days of dosing all recession stopped and they are now getting back to health.

Cheers,