Sorell - I don't really clean the substrate, just do water changes. If by any chance there's a decaying leaf I siphon it out with the hose. lol, really, there are only 2 small places I can clean the gravel anyways.
lasalawyer - lots and lots of time and research invested! But to mention a few, cutting every week, keeping CO2 at 20 ppm, fertilizing every so often with specific minerals, and some love ..