The funny thing is, I used to be into salt water and had what I'd consider a low tech reef! It was a 50breeder with a 30 gallon refugium. Only equipment was a skimmer, lights, and pumps. I set it up to be low maintenance with soft corals, polyps, tons of inverts and hardy fish. All I did was top off, dose a few supplements and do about 4 water changes a year. It looked awesome for years until I sold it before a move. To me high tech would've been ATO, calcium reactor, ozone generator, chiller, controllers, etc but I had no interest in that stuff either. I just went with bulletproof fauna and they did well. My family and I absolutely loved it, but advanced reefers would've definitely seen it as Fischer-price, my first reef tank! My goal was interesting critters and pretty colors with minimal maintenance so it totally fits your definition of low tech
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