Acans closed off

[malders]

Currently I have rock dedicated to acans (lords)

I have had one type for a few months and just added another 3 a week ago.

The oldest is not is not open while the others seem to be fine.

Wondering what advice is out there to get the one to open.

 

[Uncle99]

Age of tank?
Parameters?
Looks like N and P are off...

 

[malders]

Age of tank?
Parameters?
Looks like N and P are off...

tank has been up for ~3 years. Just ran my numbers
Nitrate is 5
phosphate is .11
calcium is 650
magnesium is 1440
alk is 6.7

 

[Uncle99]

What I am seeing in the pics is green and maybe cyano, it will kill the corals eventually. DO I see that correctly.
The rock work should be clean and free of pest algae 3 years in, provided parameters have been stable. It may just be the pics....my computer not the best.

CA and MG a bit high......should be more like CA 420 and MG say 1360.....
Alk is way low....should be more like 8-9 dkh.....if you raise....do it no more than .5 dkh per day.

When was the last time the old one was open...

 

[DSC reef]

What's your livestock, any corals nearby that could possibly sting? I'd start siphoning the cyano out during water changes.

 

[bacc2bacc]

Your water parameters are off, all that cyano is a dead giveaway. And your alk is way low.

 

[malders]

I cleaned up the rock, shortened the light schedule by an hour and fixed an issue with my gfo canister.
I upped my auto alk dosing slightly. I measure this everyday so we shall see.
I already have my water change schedule at twice a week at 20% and I test alk daily.

Time to wait and see and test some more.

Thanks for the responses everyone.

 

[Magellan]

What I am seeing in the pics is green and maybe cyano, it will kill the corals eventually. DO I see that correctly.
The rock work should be clean and free of pest algae 3 years in, provided parameters have been stable. It may just be the pics....my computer not the best.

CA and MG a bit high......should be more like CA 420 and MG say 1360.....
Alk is way low....should be more like 8-9 dkh.....if you raise....do it no more than .5 dkh per day.

When was the last time the old one was open...

I agree, I try to keep my tank close to NSW. Great looking colonies @Uncle99 !