Sulfuric acid application is a rapid and effective way to lower the pH but requires specialized equipment and applicators specially trained to handle the potentially hazardous acid. I used vinegar and it lowered the pH great, but the next day the pH was back up. (water was in a plastic gal bottle). Could i use sulfuric acid to lower the ph in my tank and how much do you add at a time. If there is enough elemental sulfur to form sulfuric acid and react with all of the carbonate in the soil, the soil pH will continue to decrease over time and stay at the lower pH value in the future. With the increasing popularity of blueberries many people have become interested in ways to quickly adjusting the pH of the soil to lower levels. If phosphoric acid is used, consider using a fertilizer with no phosphorus, such as 17-0-17, 20-0-20, 25-0-25, etc. Lowering soil pH must be done with care because ; soil pH levels below 6.0 begin to be detrimental for many plants. Soil bacteria convert its sulfur into sulfuric acid, so it works most quickly in warm, moist soil. Another useful pH-lowering soil additive is sublimed sulfur. I'm currently using it to lower the ph on my 2 mother plants I'm working on. Most plants do best in slightly acid soil, pH 6.0-6.5. Dump out 1 -1 1/2 cups of the water and replace with sulfuric acid. Get a gallon of distilled water. Adding acid to lower pH is somewhat like determining the amount of lime required to increase pH, only backwards. Sulfuric acid provides sulfur in the form of sulfate, which is needed by plants and is often low in water sources and fertilizer programs. Using peat moss, raised beds, and ammonium sulfate are also options in some cases. I was wondering if the use of vinegar instead of sulfuric acid is better for soil grow. Once the sulfuric acid is formed, it will react with the calcium carbonate in the soil. And to be honest, the ph is more stable. More than 2 years could be needed to decrease soil pH by 0.4 pH unit using a nitrogen fertilizer. For example, annual application to Willamette Valley lawns of approximately 3.5 pounds nitrogen per 1,000 square feet in the ammonium sulfate form will lower the soil pH 0.1 to 0.2 units each year. To lower the pH of loam soil one full unit, use 2 pounds of elemental sulfur for each 100 square feet of soil. Smokey. Acidification occurs faster To lower the soil pH, acid usually sulfuric acid may be applied directly to the soil. Sulfuric acid (from 20 to 98% pure): This acid is commonly used in car batteries and offers the largest pH dropping ability per unit of volume among all the strong acids. You can use sulfur or sulfuric acid to lower the pH of the soil. Its totally safe to use. Some plants (such as blueberries or ... the soil to form sulfuric acid. This is because sulfur needs to be metabolized by bacteria in the soil to be converted to sulfuric acid, which takes time. Prepare the soil well in advance of planting to avoid burning seedlings and roots. For soils with a pH under 7.5, the amount of elemental S required to decrease soil pH a given amount is fairly well related to cation exchange capacity (CEC), which is related to soil texture and organic matter. Cheers 08-12-2003, 03:19 AM #2. What is the issue with using vinegar as pH down in soil? Berry farmers use the same stuff to lower soil ph. Compared to aluminum sulfate, sulfur is generally cheaper, more powerful (in terms of the amount needed) and slower-acting. decrease soil pH more gradually than elemental sulfur. Your soil's type dictates the amount of sulfur to use. Elemental sulfur can take one to two years to convert into sulfuric acid and lower the pH of the soil. Applied in spring, it reacts with the bacteria through the summer. Other acids, such as nitric, do you add a couple of drops wait till next day measure ph at more untill you get the desired ph. 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