I think the main distinguishing factor between low tech and high tech is the amount of light provided. Light drives everything else. Tanks with a lot of illumination need extra CO2 and fertilizer; those with less, don't.
Anything over 2.5 wpg would be high tech under this definition; anything less, low tech. Of course, we then would have lower low tech and
higher high tech, but these could also be defined by the amount of light provided.
I am an upper-end low tech guy, with 2.0 - 2.2 wpg. I use a soil substrate and I am very happy with the results. I'm sure that there are plants that I could not grow in that environment, but there are a lot that I can grow.
Bill |