pH Down

Description

pH Down is a horticultural acid used to increase the acidity of water and nutrient solutions. Use with a meter, adding small amounts to your solution. Stir well and test in between doses.

Handle with caution! Avoid contact with the skin and eyes! Will cause serious burns! Rinse with plenty water if contact is made. Do not ingest. Keep away from children. Do not mix with pH Up.

What is pH?

pH is short for potential Hydrogen, shown as a number indicating a substance’s acidity or alkalinity. A value of 7 is neutral, values under 7 (1-6) are acidic and those over 7 (8-14) are alkali.

Correction should always be the last thing you do when mixing your solution. Ideally, your solution needs to be between 5.5 and 6.5. Nutrients are only available to plants within this range so it is rather important.

If you’ve never used pH down before, best to practice first. A 10l bucket of plain water can help get an idea of how much you’ll need.

Let your solution stand for another 30 mins and test again as pH may change over time. Gases like carbon dioxide from the atmosphere dissolve into the solution or from aeration influencing readings. Correct again if needed, if not your solution is good to go!

More on mixing a hydroponic solution here.