Is there a meter to read the npk in a hydroponic resovoir ? I mean to read how much nitrogen is in the water, as well as phosphorous and potassium, and anything else that might be in there.
James
jjmessenger2003@yhoo.com
Is there a meter to read the npk in a hydroponic resovoir ? I mean to read how much nitrogen is in the water, as well as phosphorous and potassium, and anything else that might be in there.
James
jjmessenger2003@yhoo.com