If you're sure your well water is OK with your fish, you might find this interesting.
I read here on MFK a couple years back, some Vietnamese/Thai/Laotian guys were talking about their tanks, they were really into flower horns, and extremely rare and large SA fish. They couldn't get really big tanks where they are, or big acrylic tanks were expensive, but they had all the free freshwater they could pipe into their house from a river they lived on.
So they rigged up a constant heavy stream of water from the river to flow into their tanks, and overflow out a bent elbow and hole in the side of the tank.
So on a 75 gallon tank, they were "dripping" like hundreds of gallons of water a day. They didn't have filters, they didn't care about bio-media, why bother. Just keep water flowing into and out of the tank, their fish thrive. Never do a water change.
I once heard discus breeders do something similar.