Seachem Alkaline Buffer 600gm/1.3lb
Alkaline Buffer is a non-phosphate buffer to raise pH and alkalinity (KH) and buffer with Acid Buffer. These buffers are designed for the planted aquarium or for very hard water where phosphate buffers may pose an algae or cloudiness problem. Alkaline Buffer raises pH and buffers between 7.2 and 8.5. It is gentle, safe, and enhances the freshwater environment.
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Product Specifications
| Parameter | Value |
|---|---|
| Form | Powder |
| Weight | 600gm / 1.3lb |
| Function | Raise pH and alkalinity (KH), buffer with Acid Buffer |
| Best For | Planted aquariums, hard water |
| Phosphate Content | None |
| Safe For | Freshwater environments |
FAQ
What is the pH range that Alkaline Buffer can adjust to?
Alkaline Buffer raises pH and buffers between 7.2 and 8.5.
Is this product safe for planted aquariums?
Yes, it is designed for planted aquariums and is gentle on freshwater environments.
Does it contain phosphate?
No, it is a non-phosphate buffer, which helps prevent algae growth and water cloudiness.

Warren Butler –
Used this in a planted tank with hard water. The pH stabilized well without causing algae issues. Easy to mix and effective after a few days of use. No cloudiness observed.
Abigail Allan –
Good for maintaining stable alkalinity. Works well with my Acid Buffer to keep pH balanced. Slight adjustment needed at first, but became stable over time.
Keith Cornish –
Perfect for a tank with low buffering capacity. The water clarity improved and plants grew stronger. No side effects or algae problems after use.