Seachem Laboratories Acid Buffer Aquarium Water Treatment
Seachem Laboratories Acid Buffer is a non-phosphate solution designed to reduce pH levels and work in tandem with Alkaline Buffer. These buffers are ideal for planted aquariums or hard water conditions where phosphate-based buffers might cause algae growth or water cloudiness.
Acid Buffer effectively adjusts pH and maintains stability between 6.0 and 8.0 when paired with Alkaline Buffer. By lowering pH, it also transforms carbonate alkalinity (KH) into usable CO2 for aquatic plants.
Product Specifications
| Parameter | Value |
|---|---|
| Volume | 2.5 oz |
| Form | Clear liquid |
| Active Ingredient | Acidic buffer solution (non-phosphate) |
| Compatible With | Alkaline Buffer, planted aquariums, hard water |
| Safe For | Planted tanks, fish, invertebrates |
FAQ
Can Acid Buffer be used alone in an aquarium?
No, Acid Buffer should be used in conjunction with Alkaline Buffer to maintain stable pH levels between 6.0 and 8.0.
Does Acid Buffer affect plant growth?
Yes, by converting carbonate alkalinity (KH) into CO2, it provides a usable form of carbon dioxide that supports plant growth in planted tanks.
Is this product safe for fish and invertebrates?
Yes, Seachem Acid Buffer is safe for use in aquariums with fish and invertebrates when used as directed.

Grace Welch –
Used Acid Buffer with Alkaline Buffer in my planted tank. The pH stabilized well and my plants showed better growth. No algae issues since switching. Easy to mix and effective.
Stewart Underwood –
Works well with my hard water setup. pH dropped smoothly and plants responded positively. I noticed more CO2 in the water, which helped with leaf development.
Jack Rutherford –
Great product for reducing pH without introducing phosphates. My tank stayed stable and plants grew steadily. No cloudiness or algae after use.
Leah Graham –
It works but requires careful dosing. I had to mix it with Alkaline Buffer in precise amounts. Took some time to get the balance right.