VitaLink ESSENTIALS pH Down is a concentrated acid (81% phosphoric acid) which can be used to adjust the pH of nutrient solutions.
Use in small controlled doses to lower the pH of nutrient solutions. Mix thoroughly and measure with a calibrated pH meter to attain the desired pH reading. Ideal for adjusting large volumes of nutrient solution.
Available in 250ml and 1L bottles.
Also available in pH Down Easy for a more gradual change in pH.