Originally Posted by wizza
Wouldn't this emulate why some people believe that their best growth comes from water change day?
The water that you get from tap has a lot of dissolved CO2 in it so not necessarily. But hey if you are seeing nice growth and little algae, keep doing it. We don't know how much light you actually have so you might have 70 PAR or 5. That will determine how much CO2 you need for the most part.