Nuxx/Peter,
I don't track my parameters unless something doesn't look right. So if you go back to the photos between Sept 2014 and April 2014 the Alk in those photos was between 16 & 18. I know that's off the scale, but the corals looked great and it just crept up there, and I am a firm believer is it works then leave it alone. The only down side is as I was fighting with a crappy regular on my Calcium Rx, anything the reg quit its steady stream there were a couple of deep water colonies that immediately would shift or lose tissue, and that's how I knew it was acting up.
After borrowing (for very long term now) a Regulator from AceEsq, I got things stable and over a period of month the alk was running in the 8.5 to 9.
I think some of the corals had better color (if not crazy color) with the high alk, but now between lowering the alk and dosing the Triton Trace elements the growth on some of my pieces has taken off.
I don't dose any carbon (like vodka). I was running Bio-Pellets for the past 2 years. But I quit those this past spring. I think there were some corals happier with the pellets (color and polyp extension) but the pellet reactors were just constantly clogging and making me have to work. I do like Aquarium Specialty dark brown bio-pellets. If I can find a Pellet Reactor with a better design I will buy it and put them back on line. I have 2 models of Reef Octopus, and the Bashsea --- DO NOT BUY A BASHSEA PELLET Reactor ----- Horrible Horrible design.
Some people have been raving about the Aquamaxx and I will look into that. The next project is going to be swapping my Dart for a Vectra L1, and trading my 10+ year old tunzes for the APex WAVs
Dave