Man, so many thoughts, and not sure how to put them all into words. Reefkeeping in the USA used to be a lot more like how the OP describes Euro reefkeeping. There was less collector-itis and more reef building. While I totally respect that things change and feel happy that people get joy out of pokeman card collecting tanks, I'm still in the reef building camp.
I think something that has been lost on a lot of recent reefkeepers is that modern reefkeeping was essentially founded in Europe. Anyone who kept marine aquaria in the late 80's and 90's remembers pre-internet reefkeeping. Information spread much more slowly, through monthly publications and books. I was just a middle schooler, but I remember that the Berlin method was highly controversial when it was proposed to American reefkeepers as an alternative to our wet-dry systems. There were some heated debates in the magazines. You see, Berlin hobbyists figured out that letting the live rock and corals manage nutrients was better than a highly aerobic nitrate factory like a wet-dry filter. It's crazy today to think that running a reef with just live rock, protein skimmer, and carbon seemed controversial back then.
Prior to that, a Swiss reefkeeper named Peter Wilkens popularized the idea that we need to replenish Calcium and Alkalinity to grow stony corals more effectively. There's a reason we still refer to it as "Kalkwasser". He also popularized the use of carbon. His book,
The Saltwater Aquarium for Tropical Marine Invertebrates, was a game changer.
Kalk stirrers are also called "Nilsen Reactors", thanks to Norwegian Alf Jacob Nilsen. He and Fossa wrote a series of books, called
The Modern Coral Reef Aquarium. Those books blew my mind. And if you ever read it, you'll notice there's a big emphasis on the ecosystem and building a reef, versus collecting frags. This hobby came into it's own at the same time I grew from a teen into an adult. So I have a nostalgic sentiment towards the hobby.
Calcium Reactor? They used to be called Löbbecke Reactors, referring to the Löbbecke Museum in Dusseldorf. Someone named Hebbinghaus first described the design in 1994.
Back in the day, there wasn't much in reef aquarium specific lighting available. The Euro guys figured out that a bulb designed for printing was excellent for growing corals and supplementing the full spectrum bulbs available in the hobby. That bulb was the Philips Actinic 03 bulb.
SPS fanatics should give credit to Dietrich Stüber, who had an Acropora hitchhike on some live rock in the 1980's. At the time it was generally believed that Acropora were impossible to keep in captivity. That hitchhiker Acro in Berlin, the Stuber Acropora, was the first documented thriving Acropora in a home aquarium.
Because electricity was cheap in the USA, we used to run these crazy downdraft and beckett skimmers with power hungry pumps, which left the venturi and airstone skimmers in the dust. The Euro folks popularized a more efficient needle-wheel venturi design that is popular today. One of the first popular needle-wheel skimmer brands in the US was called "Euro-Reef"... lol.
Anyway, a lot of this hobby that we take for granted is rooted in European reefkeeping. I'd say one of the major historic contributions out of the USA is algal filtration. Turf scrubbers and Refugiums were popularized by Walter Adey from the Smithsonian. And I think much more great stuff has come out of the USA since then. It's great that there's a market for these things now. I love my AI Hydras and my Neptune Apex. And the availability of microfeeds from folks like Reed Mariculture has helped captive breeding.
To this day, I'm not interested in fruit stand tanks and reefs that are "windex" glow in the dark blue. I'm glad those tanks bring people joy, but older grown in tanks are what excite me. I think growing large mature corals demonstrates skill, patience, and dedication. Showing a collection of rare LE frags just demonstrates you can spend money. I also favor R2R threads that dig into the science side and experimental nature of the hobby. Ironically, those threads tend to come from European folks like
@Lasse and others.
