Montipora Digitata

[Demogarr]

Allright, I have been trying to fix this on my own, but I can't figure this out. I have a two year old Monti that has been through a lot, at least two tank crashes, and has always come out on top. It is slowly dying away, has already bleached almost all over, and has very little polyp extension. All my other sps, a poccilapora, some type of acro, and two plating monti's are growing like nothing is wrong, but my digitata is almost gone. The only thing I can think of is that the lights are a little too old, and need replacing, but it is going to be another week before I have the money to do that, I don't think he will make it that long. All parameters are in check, so I am at a loss, I have tried moving him to various places and checked at night to make sure there were no munchers, nothing. Maybe the others, being newer, came in while the lights were changing spectrum and adapted better?? I don't know, just wanted some opinions.
Thanks
Alan
By the way this has been a slow decline.

[Geoff]

do the polyps extend at night? whenever i ran into problems like this i usually found out it was low Ca. since you have other stonies that are doing will, then it prolly is not the Ca.

are you dosing trace elements? if you are i would suggest stoping. if you are not, good.

what about water changes? does it seem to look any better, worse, after them?

G~

[tdwyatt]

all pert. numbers please, not just "nitrates are ok". How do you suplement your Ca and alk, etc top off,, what lighting, exactly how old are the bulbs, etc,

You know, we want all the DIRT!

[Demogarr]

Sorry, hehe I knew I shoulda posted all that. I evaporate about two gallons a day, and make up evaporation with kalk drip. The lights, I am not sure, but reaching a year to over a year, and the mh are getting yellow (they were 10k) I do monthly water changes, I just did one, and everything BUT the monti looked better.
I have two 400 watt mh, and 330 watts vho, total of 1140 watts. Tank is a 110 tall, 48x18x30. 30 gallon sump, about 10 gallon refuge. Also about 4 inch dsb. Everything in the tank moved up from another tank when I upgraded, total system has been running about 6 months, with everything in it being two years old or more. The lighting is an upgrade from what the monti is used to, when it first went into the tank it was fine, but it still didn't look as good as it used to in my old tank. The other stonies that are doing good were added/acclimated after the tank was upgraded, so they are newer, and might have adapted better?? Not sure..
I don't use any other trace elements or additives other than kalk.
There is not any better polyp extension at night. This slow decline may be delayed onset of lighting shock?? Might have been bleached all along, it was a pink montipora, and has been a light pink for awhile, I hear tha some corals bleach to pink?? Not sure.
Thanks
Alan