Seachem Alkaline Buffer 600g: Optimal pH Control for Freshwater Aquariums
Seachem Alkaline Buffer is a highly effective, phosphate-free solution designed to safely raise and stabilize the pH in freshwater aquariums. It is ideal for fish species that thrive in more alkaline environments, such as African cichlids, livebearers, and other species that prefer a higher pH. Unlike other products, Seachem Alkaline Buffer won’t promote unwanted algae growth, as it contains no phosphates, making it the go-to option for maintaining a healthy and balanced aquatic environment.
Key Features:
- Raises and stabilizes pH: Gradually increases the pH and buffers the water to maintain stable alkaline conditions.
- Phosphate-free: Contains no phosphates, reducing the risk of algae growth.
- Safe for sensitive fish: Suitable for a variety of freshwater fish that require alkaline water conditions.
| Specification | Value |
|---|---|
| Product Type | Alkaline Buffer |
| Weight | 600g |
| Form | Clear liquid solution |
| PH Range (after use) | 7.0 to 8.5 |
| Storage | Store in a cool, dark place away from direct sunlight |
FAQ
Can Seachem Alkaline Buffer be used in marine aquariums?
Please contact customer service
How often should I use Seachem Alkaline Buffer in my aquarium?
The frequency depends on water testing results and tank conditions. Use only as needed to maintain stable pH levels, typically every 1-2 weeks or when pH drops below the desired range.
Does Seachem Alkaline Buffer affect water hardness?
No, it primarily affects pH and does not alter water hardness.

Alan Gill –
Used this buffer for my African cichlid tank. The pH rose steadily and stayed stable over two weeks. No algae growth noticed. Easy to mix and effective without any side effects on fish behavior.
Piers Alsop –
Good product for raising pH in a livebearer tank. Works well when combined with regular water testing. Slight delay in effect, but overall reliable and safe for fish.
Angela Davies –
My tank had fluctuating pH levels before. After using this buffer, the pH stabilized at 7.8. No fish stress or algae issues. Phosphate-free is a big plus for long-term use.
Brian Tucker –
Works as expected. Took a few days to see results, but once the pH stabilized, it remained consistent. I’ve used it twice in the last month with no problems.