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PH- by Hy-Pro is a concentrated acid designed to lower the pH of nutrient solutions in cannabis growing. It's specially formulated for large water tanks, where a strong acid is required to lower the pH value.


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Type and Use

Hy-Pro PH- or pH down by Hy Pro is a liquid acid designed for controlling the pH in tanks for cannabis plants.

Plant Benefits

Adjusting pH levels ensures that all nutrients are available to the plants by preventing the formation of precipitating salts.


NPK 6-0-0

  • Nitric Acid 6%

Directions and Dosage

Add a small amount of Hy pro pH- to your water, mix well, and measure the pH after a few minutes. Repeat the process if necessary, until the desired acidity is obtained by the grower.

  • Soil: from 6.0 to 6.5
  • Coco and Hydro: from 5.5 to 6.0

La Huerta's Opinion

Some growers take advantage of the high concentration of this acid to dilute it with water at half dosage, making it easier to use.

Data sheet

Type of composition
Mineral or chemical
Growth stage
Type of stimulant or additive
pH decreaser
Type of grow
Aeroponic grow
Coco grow
Hydroponic grow
Soil grow

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