| First of all, ammonia would increase your pH, an ammonia salt would reduce your pH. The difference is that an ammonia salt contains the ammonium ion NH4(+) which is acidic while aqueous ammonia is just NH3 (which is a base) dissolved in water. Anyway, adding ammonia or ammonium to a nutrient solution to change pH levels is a very bad thing to do. Plants absorb nitrogen as ammonium very rapidly and this causes a very severe toxicity. Never add ammonium to your nutrient solution at levels above 30 ppm. I wrote an article about the different forms of nitrogen plants take, so you can check it out and see the effects ammonium has on plants http://allhydroponics.blogspot.com/2009/02/nitrogen-fertilization-in-hydroponics.html By the way, thank you for the reference freemangreens ! |
Here is a link that might be useful: Everything Hydroponics
