Alkaline Buffer by Seachem Laboratories
A non-phosphate buffer designed to raise pH and alkalinity while providing stable buffering against acid fluctuations. Ideal for planted aquariums or very hard water systems where phosphate-based buffers may cause algae growth or water cloudiness.
Effectively raises pH levels between 7.2 and 8.5, maintaining a stable environment without introducing phosphates.
Key Features
- Non-phosphate formula to prevent algae and cloudiness
- Raises pH and alkalinity safely and gradually
- Provides long-term buffering against acid inputs
- Safe for freshwater aquariums and sensitive aquatic life
| Parameter | Value |
|---|---|
| Buffer Range | 7.2 to 8.5 |
| Phosphate Content | None |
| Application | Planted aquariums, hard water systems |
FAQ
Can Alkaline Buffer be used in a planted aquarium?
Yes, it is specifically designed for planted aquariums where phosphate-free buffering is essential to prevent algae growth and water cloudiness.
What is the pH range that Alkaline Buffer can achieve?
It raises pH and stabilizes it between 7.2 and 8.5, depending on the initial water conditions.
Is this product safe for fish and invertebrates?
Yes, it is gentle and safe for freshwater fish and invertebrates when used as directed.

Jonathan Dickens –
I’ve used this buffer in my planted tank for several months. The water stays clear and the pH remains stable. No algae blooms, and my plants are thriving. No cloudiness even after adding new substrate. Highly recommended for hard water setups.
Pippa Johnston –
Great product for a planted tank with high alkalinity. I switched from a phosphate-based buffer and noticed a clear difference in water clarity. My shrimp and fish are active and healthy. Easy to mix and effective.
Peter Marshall –
Works well to maintain pH in my hard water tank. The water stays stable, and I haven’t seen any algae issues. A little more expensive than other buffers, but the non-phosphate aspect is worth it.