Seachem Acid Buffer
Seachem Acid Buffer is a non-phosphate buffer designed to carefully and quickly lower pH and buffer. It is created specifically for use in planted aquariums or for systems with very hard water where phosphate buffers may pose an algae or cloudiness problem. Acid Buffer lowers pH and buffers between 5.0 and 8.0. As the formula lowers pH it converts carbonate alkalinity (KH) into available CO2 to the benefit of your plants. It may also be used to safely lower pH in marine water.
Key Features
- Non-phosphate formula to prevent algae growth and water cloudiness
- Adjusts pH between 5.0 and 8.0
- Converts carbonate alkalinity (KH) into available CO2 for plant growth
- Safe for use in both freshwater planted tanks and marine systems
| Parameter | Value |
|---|---|
| PH Range | 5.0 to 8.0 |
| Alkalinity Conversion | Carbonate alkalinity (KH) to CO2 |
| Use Case | Planted aquariums, hard water systems, marine water pH adjustment |
FAQ
Can Seachem Acid Buffer be used in a marine aquarium?
Yes, it may be used to safely lower pH in marine water.
Does Acid Buffer affect plant growth?
Yes, as it converts carbonate alkalinity (KH) into available CO2, it benefits plant growth in planted aquariums.
Is this product safe for use in hard water systems?
Yes, it is specifically designed for use in systems with very hard water where phosphate buffers may cause algae or cloudiness.




Victoria MacLeod –
I’ve used this buffer in my planted tank for several months. The pH drops smoothly without causing algae issues. My plants are thriving and the water clarity has improved. No cloudiness or phosphate buildup, which was a problem with previous products.
Edward Nolan –
It works well to lower pH in a hard water setup. The CO2 conversion helps my plants grow better. I noticed a steady drop in KH, which I expected. Easy to mix and effective after a few drops.
Joe Henderson –
Great product for adjusting pH in a marine tank. The non-phosphate formula prevents algae, and the pH adjustment is stable. I appreciate the precision and safety it offers.