Aluminum Sulfate--What NOT to do!
The nursery sold me aluminum sulfate in place of Ph Down since none was available locally.
Boy! Bad mistake! Do NOT use this to balance Ph in a hydroponic system. The guy assured me it desolved in water. NOT! It lays in the solution and takes too long to affect the Ph. Then when you keep adding trying to make a difference, hours and hours later you have a Ph so low, its off the charts.
After babying my tomatoes, peppers and eggplant for months, I have 5 out of 6 dead bodies or close to death. The acid cooked the roots. Don't use this product in hydroponics.