I hope Im not out of topic here... born and raised in a tropical island where life itself was low-tech, I had the opportunity of being introduced to tropical fish at a young age and was fortunate to meet a few breeders. Nowhere to this date have I seen the size and quality of certain tropical fish where the most elaborate filtering was a box type filter used on anything from homemade tanks to pools. The main focus on tank-keeping were "lots" of plants, aeration, water changes and quality foods (mostly live)... talk about low tech! Of course conditions were ideal as far as natural light and temperature since most of the tanks were in an outdoor settings, sure I'm probably missing some small details of maintenance, but those were the basics. This simplicity approach to fish-keeping was perhaps the best lesson I've had regarding this hobby. I'm glad to see Caliban07 taking the time to promote the low-tech approach and will be looking forward to following this thread.