The most concentrated, water-soluble humic acid product on the market today is RAW Humic Acid, which contains 59% humic acids derived from leonardite. In nature, humic acid has a buffering effect on the pH of soils. It can raise the pH of acid soils and lower the pH of alkaline soils. RAW Humic Acid is great for hydroponics applications, especially when added to RO filtered water. RAW Humic Acid is a natural chelator and is a beneficial supplement to all feeding schedules. A 2 oz package of RAW Humic Acid makes up to 200 gallons, an 8 oz package makes up to 800 gallons and a 2 lb package makes up to 3200 gallons.