Heres a little update. Things have improved more in the last month than they did in the year preceding it. I'm getting noticeable growth in my green and orange montiporas again. The green with purple rim has improved in colour (more vibrant) as has the purple polyp montipora (not pictured because I'm lazy).
What I did: I lowered my alkalinity to 9 dkh from 10, I set my temperature to a steady 78F and I began dosing 1-2 drops of Lugol's Solution each day. I used to use the seasonal temperature variation function on my neptune controller which allowed the tank to peak at 82F in the summer and drop to 76F in the winter. Although it wouldn't fluctuate by more than 1 degree F in a day I suspect that the winter low was adversely effecting my corals recovery. With regards to Lugol's, I used to use this product for several years but stopped about 2 years ago after reading some of Randy's articles. I'm not sure if my tank was necessarily deficient in potassium or iodide but dosing it does seem to be helping. Or maybe its just coincidence, I don't know.
This is one of the small frags that I salvaged. I believe it was one of the ones pictured on page 1.
In this older picture you could see how pale the green with purple rim montipora was versus how it looks now.
