I have about 20 tanks varying in size from a 1 gal (apprx) flour jar up to a 72 gal bowfront. Most of which are on the small side. My tanks are an unholy mish mash of high tech, low tech, and no tech. I like trying to grow low light plants in a CO2 and fertilizer enriched, but still low to medium light, tank. I also like growing plants that 'must' have CO2 and high light in tanks that have neither. Right now I am playing with some 'high light' plants in a tank that can best be described as a medium light tank with pressurized CO2 and EI ferts. Sometimes I am successful and sometimes not. Though I do have fun and learn a great deal as I go along. I take particular delight in seeing what and how others are doing in keeping their planted tanks. Good luck.