yellow polyp losing color

[sree]

My yellow polyp colony that used to be bright yellow in color is now turning into a dull greenish yellow color. Does anyone know what could be the reason? The coral is sitting on the tank bottom. I have a 480W T5 light. Could it be low lighting?

 

[sree]

Mine is a 125g.
PH: 8.25
SG:1.025
Nitrates:0
lights: 480W T5

The coral is growing like crazy and spreading fast. Its just that it lost its beautiful bright yellow color and kind of looking dirty dull green.

 

[sree]

This is the 6' long aquaticlife T5 that comes with 6 T5HO 39W Actinic lamps and 6 T5HO39W 10k giving a total of 468W. The bulbs are about 8 months old.

 

[sree]

Unfortunately I dont know the par on the sandbed. I have a waving hand Xenia next to this coral and that is doing very well. All other corals are maintaining their original color.

 

[sree]

beccamc10;607901 wrote: Move the coral up in the tank and see what it does.

Should I replace the 6 10K bulbs with the 20K lamps?

 

[sree]

beccamc10;607901 wrote: Move the coral up in the tank and see what it does.

I will surely try that. Most of it are attached to a small rock and I can move it up. The rest have spread to larger rocks that are impossible to move. I will see how this goes.

 

[landon]

I have 250 W MH lighting any my Yellow polyps are at the very top of my tank. They seem to like their hight.