What causes this?

[Luwe2008]

What causes SPS to brown out other than Phosphate?

 

[iap]

Lack of light .. High nutrients..

 

[Kataro]

aefw

 

[Luwe2008]

aefw

How do I know I have them for sure?

 

[allsps40]

^You will see small circle shaped bit marks in the tissue and poor PE.
Low alk can cause poor color as can low iodine and nitrates over 5ppm.
How long have you had the browned out sps? What are your water parameters? What lighting are you using?

 

[Luwe2008]

^You will see small circle shaped bit marks in the tissue and poor PE.
Low alk can cause poor color as can low iodine and nitrates over 5ppm.
How long have you had the browned out sps? What are your water parameters? What lighting are you using?

Phosphate-Undetectable
Ph-8.3
Alk-9.6 Dkh
Cal-390
Mag-1245
Chiller Temp-76

Havent tested iodine.
They have been brown for about a week now.
I have 1 hqi 250watt 14k pheonix metal halide. Buld also only about a month old.

Thanks for the help btw.

 

[Luwe2008]

Should I start doing more water changes?

 

[allsps40]

Your Ca could come up a bit around 400-420 mag is ok but could come up to 1300. Your are using a good light. What are your nitrates? Do you does any potassium iodine like Lugos or other iodine additive? It helps with sps color. How often do you do water changes? What size tank?

 

[Luwe2008]

I havent tested my nitrates. "/ I havent been dosing but I previosly dosed Potassium, Strontium, Iodine from brightwell. Well I was busy so I didnt do any water changes for about 3 weeks until last week I did a 15 gallon water change. I have a 60 gallon tank.

 

[Luwe2008]

Bump

 

[philipchan]

over dose Iodine may cause problem

 

[iap]

If you have aefw, or think you do, is it possible to still have PE? I noticed some white spots on two corals but I still have great PE and color and growth.

 

[Luwe2008]

hmm idk? i would think you wouldnt have PE?

 

[Luwe2008]

???