Quote:
Originally Posted by Quantrill  Huh??
Virgin Sulphuric acid, commonly used as battery electrolyte is the most used pH down adjuster in commercial horticulture. Because it is cheap, effective, easily acquired and does not skew the nutrient solution as badly as phosphoric acid does.
pool and spa pH adjusters usually are sodium based and can add much sodium to the solution.. Which is why everyone warns against its use. However sodium can take the place of some of the potassium plants need without any harm and sometimes it improves yield.
Before you use anything for a pH adjuster you should calculate the amount of fertilizer salt it will add to the solution and adjust your fertilizer regime accordingly. |
Hmmm.... I belive we have a mis-communication here. I'm not sure why you are quoting me. From what I can tell we are in agreement. What I was getting at was that sulfur is easily turned into sulfuric acid which is responsible for the lowering of soil PH when sulfur based amendments are added to the soil. I understand that it is a slow acting amendment. I figure that if a (hopefully) lead free sulfuric acid, no matter the source, was introduced to the medium then it would cause PH to drop significantly and immediately.