Info: Seachem Acid Buffer™ Dosing Instructions

To lower pH, use 1/4 teaspoon (2g) for every 80 L (20 US gallons) daily until desired pH is reached (this dose lowers alkalinity by about 0.2 meq/L (0.6 dKH)). Larger doses may be required in very hard (KH) or alkaline waters. For precise dosing, use the Seachem Digital Spoon Scale™.

In order to adjust pH gradually, or if water is soft or not well buffered, use Acid Buffer™ with Alkaline Buffer™. When using Alkaline Buffer™ & Acid Buffer™ together to target a specific pH, utilize the suggested ratio chart.

This chart is based on use in RO or RO/DI water and ratios may need to be adjusted for use in tap water.

HINT: First determine the amount of Alkaline Buffer™ needed for the volume of water. This should be determined based upon your desired alkalinity (KH). Then, divide by the number in the middle column to obtain the correct amount of Acid Buffer™ required.

Acid Buffer™ Dosing Tables

The following table gives the standard doses for using Acid Buffer to lower the KH and pH without the use of Alkaline Buffer™. Each dose will decrease alkalinity by approximately 0.6 dKH - the impact on pH will vary by system. Be aware that lowering the pH using Acid Buffer™ alone should be done with care to ensure that the pH does not fall too far.  To target a specific pH, use together with Alkaline Buffer™.

Water Volume 1 qt / 1 L 1 gal / 4 L 10 gal / 40 L 50 gal / 200 L

Dose (g)

0.025 g

0.1 g

1 g

5 g

Dose (tsp)

1/320 tsp

1/80 tsp

1/8 tsp

5/8 tsp



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