Seachem Alkaline Buffer™ and Acid Buffer™ are products for freshwater aquariums that help adjust and maintain water hardness (KH) and mineral content. It's particularly useful for planted tanks and fish that require specific water conditions.

It is primarily used to increase the mineral content of soft or RO (reverse osmosis) water. Soft water typically lacks essential minerals like calcium (Ca) and magnesium (Mg), which are crucial for the health and well-being of aquarium plants and certain fish species.
Equilibrium™
Equilibrium™

How To Use:
In the four input fields below, enter the volume of aquarium water to treat, the current KH value, your desired KH value, and your desired pH value.

Tapping or clicking outside the input fields updates the number of grams of Alkaline Buffer and Acid Buffer needed to achieve your desired KH and pH values.

Acid Buffer lowers pH and buffers between 6.0 and 8.0 when used with Alkaline Buffer. When used alone Alkaline Buffer raises pH and buffers between 7.2 and 8.5.
Carbonate Hardness (KH-pH) Calculator
pH KH KH
Desired Current Desired
RO
gallons meq/L meq/L
ppm ppm
liters
Alkaline Buffer™
grams tspns
Typical Range
70 to 140 ppm
(4 to 8 KH) Acid Buffer™
grams tspns