Tom doesn't post here anymore, but the answer is yes. The principle behind EI is to dose more than the plants need, so they never run short of any of the nutrients. Then once a week replace half of the water to "reset" the tank, getting rid of most of the excess of any of the nutrients. Flourish is only a trace element mix, so it alone won't work. But, you can use Flourish Nitrogen, Fourish Potassium, Flourish Phosphorous, and Flourish in an EI system.Hi Tom,
Can you apply the EI system to liquid ferts such as Flourish??
Check out the date on this thread. It happens to the best of us, just keep an eye out cause sometimes it's better to start a new thread than add to an old one.
But yes you are right, it is much more expensive.