Colt starting to look like an old tree trunk

[nuclearheli]

Can anyone tell me what might be going on with this Colt?

http://www.reefcentral.com/forums/picture.php?albumid=3428&pictureid=24957

It is a mature colt, full polyp extension during the day, looks healthy otherwise.

In a 90 reef tank, mature tank. Many other corals, mixed reef. Temp 78 - 79, Salinity 1.026, Calcium 460, Mg 1250, alkalinity around 8, Nitrites 0, Nitrates <10, ammonia 0, phosphates 0, pH 8.3 Day 8.1 Night, Day Lights 2x 250W Halides, T5 Act's, LED's.

Have not changed anything recently. Water changes every 2 weeks, 10%, running activated carbon, phosban reactor. Skimming well other corals look healthy. Fish all healthy.

[RokleM]

[moved]...

[oscarb]

how old is your tank i have a colt and i have not seen it look like that. is the colt seating high on tank, mid, or low i have mine on low and it extend all the way up to the top. maybe the light is too intense for it. i have t5 running 8 x 54w and i have no problems with it. it opens fully. i need more info thanks

[nuclearheli]

The tank is 6 months old but the colt and much of the tank was moved from another tank back in July. The colt is actually about 2 years old and has always done well. With the exception of the camera glare (sorry) the picture below was taken this morning. Nothing with the health or exetnsion of the colt has changed and frankly it looks fine to me. It's not crowded, on top of the water, and the stalks in question are not subject to direct light at all. The white areas don't seem to affect it at all. It's has not drooped or fallen over, gone limp or retracted.

Tank paramaeters are very tight and stable and have not changed

90 Gallon mixed reef
2x 250W 20K, 2x T5Act, LED night
Salinity 1.026
Alkalinity 8 - 9
Calcium 460
Mg 1280
Nitrate < 10
Nitrite 0
Ammonia 0
Phosphate 0
Temp 78 - 79

http://www.reefcentral.com/forums/picture.php?albumid=3428&pictureid=25078

[oscarb]

what was the salinity it was before u moved it to your tank i always try to keep my parameters the same as my local suppliers. u did not mention you ph. does look healthy. this a pic of mine on your left

150gal 40 gal sump t5 sunblaze 8x54w actopus skimmer 2 kol power heads 1200gph 1 phosphate reactor and 1 carbon reactor
my parameters are
ph 8.0-8.2
ammonia 0
nitrate 0
nitrite o
calcium 450
phosphate 0
temp 74-76

[oscarb]

what was the salinity it was before u moved it to your tank i always try to keep my parameters the same as my local suppliers. u did not mention you ph. does look healthy. this a pic of mine on your right

150gal 40 gal sump t5 sunblaze 8x54w actopus skimmer 2 kol power heads 1200gph 1 phosphate reactor and 1 carbon reactor
my parameters are
ph 8.0-8.2
ammonia 0
nitrate 0
nitrite o
calcium 450
phosphate 0
temp 74-76