Flairform pH Up & Down are non-corrosive*. This solves the long-standing safety and handling problems associated with regular pH adjustment solutions:
- Concentration: Flairform’s ‘organic’ pH Down contains 50% w/v citric acid. Flairform pH UP contains 60% w/v potassium carbonate (equivalent strength to 40% w/v potassium hydroxide).
- Ideal for mail order and distribution: No special freight, handling or storage requirements.
How to adjust pH
Step 1. Measure the pH: Use either a liquid pH indicator or an electronic pH meter. Before measuring the pH, ensure that the nutrient is well stirred and that the sampling container is clean.
Step 2. Choose a target pH: It is inconvenient and unnecessary to hold pH at a single point value so choose a target pH that provides both a safety margin and minimizes the amount of pH maintenance. For example:
● If your pH tends to continuously rise (the most common trend), then at each adjustment, reduce the pH to about 5.0 using pH Down. This will give you a much larger pH “safety” margin than, for example, 5.8.
● If pH tends to fall, at each adjustment increase the pH to about 6.0 using pH Up.
Step 3. Adjust the pH: Add a small amount (e.g. 1ml per 50 litres) of pH Down / pH Up. Then stir well and check pH. Repeat this process until the target pH is reached. When using pH Up, ensure to pre-dilute the dose at least 100-fold with water before adding to the nutrient.
Adjusting pH by trial-and-error can be tedious, especially for large reservoir volumes. Refer to Note 1 below for an alternative method.
checkout: Flairform SilikaMagic Silica 1L