"Phil Williamson" wrote in message
...
Algae isn't a problem in my tank. How long would it take to see the
effects
of the CO2?

Phil...

Probably not very long. You might see pearling within a day. If all other
nutrients are present, the plants should start growing faster almost
immediately. Keep in mind that you might have to dose nitrate in addition to
potassium, so test for that.
__
Alex
pcalex (at) hotpop.com