christmas tree worm rock looks like it's bleaching

Did you changed the lights on much more bright, or PC on MH recently? If so, it could be reaction on this.

If not - I would check water parameters (ammonia particularly and alkalinity), do some water change, run frequently changed carbon (daily for a few days - in case of some toxins in water). But other inhabitants should react on this too.

Does it has has a pink band at worm holes openings? If so, it could be pink band disease, more caused by environmental stress.

My brown porites Xmas tree rock bleached to the pure white color, during the toxic tank crash. I disassembled this tank - removing all inhabitants in the containers with the good water (good to have a big tanks as a backup up!), changed it frequently, run carbon, changed it frequently too. Then assembled the new tank.

Brown porites restored their color in 2.5-3 months.

If you can post a picture, it could help to see, what is going.
HTH
 
we changed the bulbs about two weeks ago and they were the same types of bulbs we have had on the tank but i would say about 25% brighter than what they have been at recently. the alk and ph was low so i have adjusted that and did a large water change. the thing is everything else in the tank- soft corals, mushrooms, polyps, zooanthids, xenia, etc... they all look great.

i don't see any pink bands around the worm hole openings.

the xmas tree worms look good, but the brown porites i would say about half the rock is bleached.... and it seems more so the side that was further away from light, so i am thinking it may be a lighting issue. because of this i moved the rock into a smaller tank where the coral is much closer to the light than it was in my 55 gallon.

i will take some photos and post soon. thanks for your response, i appreciate it.

p.s. do you feed your xmas tree live phytoplankton? how often?
 
You know, my tank is somewhat untypical - until recent time, it was exposed to direct sunlight from the southern window, in addition to the PC. I had a lot of green microalgae growth on the walls, released during cleaning the glass.

I didn't dosed phytoplankton - dried or alive - for the most of 1.5 years, that I have Christmas tree worms, except the short trials, couple of weeks each, but both affected water quality badly. Had to stop.

This tank has Christmas tree rocks and small clams - Tridacna maxima, who also should feed on the phytoplankton. They grown a lot, being bought 3/4" in size.

I mostly feed the smallest dried crustaceans, like ZoPlan.

There was recent thread about coco worms, one guy is keeping the Xmas tree worms already for 5 yeas, and he posted all his information on feeding, mostly by phytoplankton.
HTH
 
excellent, can you post a link to the coco worm thread and the guy that has had xmas tree worms for 5 years? i would love to see what he is doing. i looked for it but don't see it anywhere...
 
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