Lowers KH to Lower pH in Stubbornly High pH Water
Uses: Acid Buffer™ is used in conjunction with Neutral Regulator™ when the pH is very high or is difficult to lower to 7.0 with Neutral Regulator™. It reduces the carbonate hardness (KH) of the water, making the pH much easier for other products to buffer. If your pH is very high and resistant to buffering, Acid Buffer™ is your answer! Consider using with our other products.
From the manufacturer: Acid Buffer™ is a non-phosphate buffer to lower pH and buffer with Alkaline Buffer™. Both buffers are designed for the planted aquarium or for very hard water where phosphate buffers may pose an algae or cloudiness problem. Acid Buffer™ lowers pH and buffers.
| Product Name | Seachem Acid Buffer (300g) |
|---|---|
| Brand | Aquatic Arts |
| Function | Lowers KH and reduces pH in high-pH water |
| Best Used With | Neutral Regulator™ |
| Water Type | Planted aquarium, very hard water |
| Buffer Type | Non-phosphate |
FAQ
Can Acid Buffer™ be used alone to lower pH?
No, Acid Buffer™ is designed to be used in conjunction with Neutral Regulator™ for effective pH reduction. It reduces KH but does not lower pH on its own.
Is Acid Buffer™ safe for planted aquariums?
Yes, Acid Buffer™ is specifically formulated for planted aquariums and is safe for use in such environments.
Does Acid Buffer™ affect phosphate levels in the water?
No, Acid Buffer™ is a non-phosphate buffer and does not introduce phosphate into the water, making it suitable for preventing algae growth and water cloudiness.

Kylie Arnold –
Used Acid Buffer with Neutral Regulator in a high-pH planted tank. The KH dropped significantly and pH stabilized at 7.0 after a few days. No algae issues observed. Works well with the other buffer products.
Adrian Wilkins –
Helped reduce stubbornly high pH in my hard water tank. Combined with Neutral Regulator, it made pH adjustment much easier. Tank clarity improved after a week of use.
Michelle Underwood –
Non-phosphate formulation is a big plus. No cloudiness or algae appeared after using it. Works smoothly with my planted setup and maintains stable pH.
Anthony Nash –
It reduced KH as expected, but required multiple applications to see results. Would recommend pairing it with Neutral Regulator for best outcome.