melev

That stinks. I am not sure I buy the photo period thing BTW. I think if the lamp is too "hot", a filter is a better idea. A layer or two of screen door material to dampen the new lamp. And burning lamps for a few days elsewhere seems to work as well. I had an old ballast in my shop I would "burn in" new lamps prior to installing them over the reef. Just a thought!

Melev, that sucks. Its weird when you go on vacation and things go to crap. I recently went on vacation, and I am currently paying the price. Something strange happened and lost most of my sps. Maybe ALK dip or something but it baffles me.

Lesson learned, don't go on vacation.

I lost one of my favorite sps colonies, by not accumulating it to a new bulb change. It was right under the bulb... Then the next time I changed the bulbs out . My ritteri anemone didn't like the dim lights from the three screens I was using. So it decides to floating around my tank, looking for a new brighter location. He found it. Right in my mod'ed maxi-jet pump. Kill all my fish in the tank except the two clownfish.

So sometimes you can't win. LOL

I wonder if the physics of light waves is similar to that of Sound Waves. If so, it may explain why the Coral on the outside edges of the "hot zone" were affected. If so, the intensity at the edge would be greater than the intensity of light / heat in the middle due to the Overlap of light waves from the two lamps being combined at those points. Basically the edge corals would have the intensity of the left light plus the center light, or the right light plus the center light. Just a possibility. Huygen's Principle or something... I just don't know if the principle relates to the properties of Light like it does Sound. I only had to test on the physics of Sound...

Hey Mark,
What about the possibility of the new biopellets? I lost 3 acros when I went to biopellets. Also lost frogspawn. Acros were the first to go. Although everything seems stable now, it was very disheartening.

It could have been an issue of the newly seeded biopellets. However, the total volume of new pellets wasn't matched to the water volume of the tank.

The Tyree coral that died was green after death. This is referred to as "boring algae" and could have been a factor. In all likelihood, something triggered a negative response and the dying tissue hitting the neighbors could have hurt the other corals and took them out.