Tank looks great! Glad to know you've decided not to evict the glass-thumping fish before the first month is out...
I admit that I find the setup really interesting, too. I can't afford to play with too much equipment these days ($), but can enjoy vicariously. Like a lot of folks who come through here I have some past experience in marine tanks, and have read some of the better-known old threads that attempt some interesting high-tech experiments, including with ozone. At least one well-known thread (Chad Hughes) delivered the ozone by mixing it in a cheap protein skimmer in the sump, with carbon behind it. (Given the cost of the dedicated reactors out there, I can see why.) I personally decided I didn't want to mess with that, partly because I didn't already have components ready-at-hand, nor experience with it, and I can appreciate the principle of simplicity (oft recommended on here, and with reason!). However, some of the things said about ORP led me to go ahead and add a UV to my fledgling setup, despite the fact that is isn't essential. I also read some of Randy Holmes-Farley's comments about carbon and decided to use some of the Seachem Matrix carbon passively in my (canister) system in addition to a Purigen reactor (in a Phosban 550). As I recall, the Matrix profiled pretty similarly to the Rox. (I need to read your links, but seem to remember ash content as one marker that people were looking at relative to risk for HLLE.) Still planning to do significant daily water changes once the fish show up, but I enjoy trying to have an edge and some insurance as I learn. I hope you'll let us know how things unfold (and how you tweak your system) over time. (Now that I've gone this route I won't be trying the rooibos anytime soon--I didn't realize till seeing a comment recently that the tea is used not merely for aesthetics but for anti-fungal and/or anti-bacterial attributes... would be interested in more about that, assuming that's accurate.)
Meanwhile, and most importantly, glad to know your fish are out and eating! Good news! Though I guess that means you won't be giving them away...