I agree, my step into the 21st century was reading r2r. Like what's a filter sock? Lol.
Our 30 yr old transitioned to a 100 gallon pretty well. I'm pretty glad to hear from Paul B that some of the "old" ways without the bells and whistles are ok too! We follow old school sand bed vacuming, water change, cleaning etc and pretty much observe. My new test kits came in and nitrite, nitrate, ammonia were 0, phos alittle high, ok, need to change r/o filters!
Easy peasy! Observation is best