You have no items in your shopping cart.

Growth Technology pH Down

This pH Down contains 81% phosphoric acid (H3PO4) and has been developed by Growth Technology - a name you can trust!

An essential additive for most hydroponic growers, it allows you to get your reservoir pH down to a level which is optimum for nutrient uptake.

It is available in 250ml, 1L and 5L bottles.

Warning: pH control chemicals are highly toxic and aggressive liquids. If pH Up and pH Down come into contact with each other they react violently and even small quantities they can be explosive. Make sure the two liquids NEVER come into contact with each other as this can cause a violent or explosive reaction. Please follow these simple guidelines for safety and peace of mind:

  1. ALWAYS store these materials in a safe place, preferably in a locked cupboard. Always keep them out of reach of children
  2. ALWAYS wear rubber gloves and protective goggles when handling any aggressive chemicals
  3. ALWAYS dilute pH control solutions before use


If it is accidentally ingested, seek medical advice. For more info on handling aggressive liquids, call our team on 0207 381 8334

Collection Delivery
  • Collect in store
  • 7 days to collect
  • Open 10am - 6pm
In Stock

How long will it take for my order to be delivered using standard delivery?
Standard delivery is within 5 working days.

How much does standard delivery cost?
Standard delivery costs £7.00(regional and heavy item surcharges apply and will be calculated at checkout).

Growth Technology pH Down 250ml
Growth Technology pH Down 1L
Growth Technology pH Down 5L
Show all Growth Technology products