^ Adam59600 the smaller the tank the more the chemistry and temperature fluctuate. The bigger the tank it's actually more stable, which is why saltwater systems are usually done in large tanks, saltwater must be kept in much more strictly controlled parameters. My 29 takes less maintenance than my 10. Although I always use my ten for ecosystem experiments. My record so far: five generations of platies in 4 years without a single water change and no food added, just distilled water added to replace evaporation. My most recent was with tetras and I never could get them to breed. The original livestock died in about 3 years and then I just let the tank dry up and now there are some plants still living without water. They are just getting water from the gravel, and I don't even have the lights running. I don't think those plants will live much longer, but every week they keep surprising me by still being alive. Once the gravel dries up though, they will be toast. Maybe then I'll experiment with some clones in the tank, see if the enclosed environment makes them mold or something.