Very nice tank. How high above the waterline are your Atlantiks? You have managed to get a lot more out of them than I. I finally gave up after frying most of my SPS.
thankyou
the atlantiks are 6 inch above the water, give or take
i do have optiwhite cover glasses on the tank (wrasse tend to bounce off them once in a while so i leave them on), and i have delensed the atlantiks- which makes for better "blending" and a more even spread- though actually there was absolutley no shift in the uptake of cacl2 and nahco3 when i did this (leading me to believe i didnt reduce par too much, just distributed it a little better)
the atlantiks are all channels 100% for 6 hours per day, with a 3 hour ramp up and down either side, in this way i go against what a lot of reefers do with led! but it was my first leds having previously been t5, and i wanted to see what the led could do, so i been this way from the start (imho a lot (but not all) of the "led bleaching" threads i saw on my local forum were actually quite the oposite, and the advice and reefer response oposite to correct
I did though "bleach" a green foliosa and green digitata montipora on intro, which took a few months for these coral to adjust, though it has to be said my tank at the time was though chemically good, biologically it was poor and immature which will not have helped! (which resulted in a 4 month battle i evrntually won against dinoflaggelates)
when i shifted my coral stock over from my holding tank (my old dt while i built this), on a like for like basis the uptake of cacl2 and nahco3 increased instantly by around 40%!! light was the only real factor involved (corals were located if anything lower in this tank). previous light was a 12x54w t5 sfiligoi (cooled) over my 4x2.5x2.5 previous dt
hope that gives you something to work off, its probably not the way an led expert would do it!
btw the efflo/soli i take pictures off has grown from 3cm across to 18cm across (give or take a cm) in 8 months, and is 9 inch below the water, just outside being directly under the atlantiks.