Well here is an update, and I think very interesting. As I said earlier I removed a hystrix frag badly affected and a good friend put it in a relatively new tank with very few corals in it, under 2 AI blades. Literally overnight the blisters disappeared, over the last 10 days ot has recovered and has started to send out multiple new growth tips! In the time it has been in his tank I have been running the MH over my tank as I thought I would test the hypothesis that it was my LEDs. There hasn't been a great deal of change in my tank so far. But 2 days ago we decided to move the hystrix frag back to my tank under the MH and see what happens, anyway looking at the frag this morning the blisters have come back!!!@Troylee your Calcium is running high because of Kalkwasser and All for Reef. Both raise Calcium. All for Reef is particularly interesting because it doesn't raise it immediately, it raises levels as time goes on.
You might dose AFR Monday and not see a change in Calcium until Wed/Thurs. Kalk definitely raises Calcium as well depending on your saturation point.
So my MH theory may work in @justy experiment. I am almost positive there are certain bad bacteria and pathogens in all water that MH sterilizes. I don't think LEDs have the opportunity to do this as they lack many outputs that MH has, like true UV, etc.
In short, I think the SPS color up more under LEDs to protect themselves from this bad bacteria. Call it either a protective response or an aggressive approach that repels the bacteria for whatever reason, one of the two.
Under MH, the SPS aren't that colorful, but grow fantastic as they don't need to color up as much to protect themselves from the bad bacteria.
I'll do a complete write up or video on this soon and add some things I've discovered. It's no debate that using MH, SPS do better health wise and under LED they display magnificent colors. I've noticed MH is more forgiving of mistakes in water chemistry than LED. I can bring back AN Acropora 90% of the time that has almost completely expelled it's zooxanthellae and is totally white skeleton. I have numerous examples of this that I've done this year with Maricultured. Maricultured has been looked at as almost impossible to keep alive past 4 to 6 months in the home aquarium. My reef system is 90% Maricultured and they almost all looked pretty bad after coming to me from stress during shipping.
At any rate, these discussions we've had here are very good as every one of you has an open mind and is willing to test and try different approaches. That's how the industry will find breakthroughs in science as it pertains to corals, lighting, water chemistry, feeding, etc. So thank you all for the excellent discussions, keep it up!
@justy or @Goonter any difference in your corals so far? Just I believe you switched to 150w MH?
Any thoughts please, my therory of it being the lights seems to be wrong as this suggests its environmental?