This is my current oldest tank at nearly two years. I rarely even feed this tank. It's pretty much entirely self-sustaining at this point. It mostly just gets top-offs with RO water and the occasional water change if I'm feeling frisky.

Stocking is 12 ember tetras, 5 chili rasboras, some wild type neos, and three amanos. Honorable mention for the population of bladder snails.