Most freshwater plant folks who also keep fish in the tanks use between 2-4
wpg.

More is great for plant only tanks.


Graham.

"SG" wrote in message
...
In article , NetMax wrote:

Two watts per gallon is only 'low light'?? *gulp*, and you would run
6w/g....

heh reef keepers run 8 and up. I suspect the that freshwater plants
guys run similar. 2w/gal is low, but it is also enough to keep a good
number of plants.