So here is my current thinking, going back to April, I needed a way to reduce costs and complexity in the reef, and I had been reading about some of the Coral propagating superstars and how they ran their systems. The common thread seemed to be SIMPLE works. STABLE works.
Jason Fox's system, for example, uses all kinds of lighting with similar results from tank to tank. All tanks are plumbed to a central system and the article's writer reported not seeing one unhealthy coral in any of the tanks. His secret? Lots of flow, not too much light, live rock, lots of GFO and regular water changes. I believe he uses IO for his salt. No carbon dosing, no supplements, etc.
I also saw several threads where freshly made saltwater was sent for ICP Analysis - and one thing I noted was that the few elements that I have dosed, such as Zinc, Manganese, Iodine, and Iron were all over the map as far as concentration, with some having way higher values while others were close to NSW. What that told me was that for some salt mixes, water changes are also a form of trace element dosing. Take a look at the values for some of these from a Polish study:
Notice that the high values for Zinc, Manganese, Iron, and Iodine? No wonder my water changes with AF salt in the past were not as effective as they could have been without supplementation. I've seen correlation of these values elsewhere BTW.
With some mixes, combining water changes with Trace element dosing could be disastrous, while with others, they may work synergistically.
As I had no money or desire for buying lots of salt mix, I continued my regular dosing of DIY Zinc, Manganese, and Iron, and added Strontium to the mix. This is a replacement of water changing for me. My calcium reactor with reborn handles many other of the macro and micro-elements. Other than when the ALK dropped to 4.5, overall coral health has been very good and consistent.
Its easy as an overall method, the skimmer is cleaned about every three weeks, I pull out some Chaeto every other week, and I vaccuum up detritus when I feel like it. We will see how stability and simplicity pays off in growth an color, I feel like the tank is about to take off.