It really depends on what kind of plants you want to keep, and how big you tank is. My first real planted tank is a 36 incher with DIY CO2. I had selected plants that will thrive with amber lighting, but limited CO2 supply. Growth wasn't as spectacular as CO2 injection, but its a big improvement compare to what I had before introducing DIY CO2.
Don't laugh... this is what it looked like back in 2001.
36" old style mirror tank (150L?)
DIY CO2, DIY fertilizer, and gravel
4 X T8
1 X 2016 canister

Sorry about the quality of the photo, it was taken by a real cheap first generation DC...
_________________
Bye Bye Mash BB! 你要保重, 你永遠係我既乖BB。
