Citric Down

Brand: Future Harvest

Product Code: 0300480

Availability:In stock

$9.99 9.99

Available Options


CITRIC DOWN will lower the pH level of your nutrient solution. The ideal pH for most hydroponic nutrient solutions is between 5.8 and 6.2, with some exceptions. Nutrient lockout will occur if pH levels are outside optimal levels.

Citric acid is a weak acid and while typically it will drop pH levels, its instability will cause the pH to raise back up over a couple of days. To counteract this instability, Citric Down contains stabilizers which help to keep the pH at the optimum range.

While lacking the strength of Phosphoric Acid based pH Down products, Citric Down is considerably more safe and none of it’s ingredients are listed by Transport Canada or the US Department of Transportation as dangerous goods, so there are no restrictions on shipping the product.


Citric Acid

Suitable for soil, coco and hydroponic systems.
Compatible with most quality brand nutrients.

Start by adding 1 mL per gallon of Citric Down into your nutrient solution and mix well. Check the pH level of your solution with a meter. Add small increments of Citric Down while mixing until you have reached your desired pH level.


Ask a Question
  • I found out I'm allergic to CI+Me - Isothiazolinone (MC/MI), Budesonide, and Hydrocortisone-17- Butyrate. Does this produce have any of these ingredients in it? Thank you, John

    To the best of our knowledge, all of our products, including Citric Down, are free of these chemicals.