Seachem Reef Buffer Aquarium Water Treatment
Reef Buffer by Seachem Laboratories is specially formulated for reef aquariums where maintaining a stable pH of 8.3 can be challenging. When applied according to instructions, Reef Buffer effectively elevates the pH to 8.3 safely, avoiding the risk of surpassing harmful levels. Additionally, it boosts carbonate alkalinity in the system. Unlike single-component solutions, Reef Buffer is a unique blend designed for optimal results. If pH adjustment isn’t needed, consider using Reef Builder to enhance alkalinity. Monitor pH and total alkalinity levels with Seachem’s MultiTest: Marine pH & Alkalinity kit for best results.
Product Specifications
| Item | Quantity: 1 ea |
|---|---|
| Volume | 8.8 oz |
| Use | Reef aquarium pH and alkalinity adjustment |
| Target pH | 8.3 |
| Function | Raises pH and increases carbonate alkalinity |
FAQ
What is the target pH level achieved by Reef Buffer?
Reef Buffer raises the pH to 8.3 when applied according to instructions.
Does Reef Buffer increase alkalinity in the aquarium?
Yes, Reef Buffer boosts carbonate alkalinity in the system.
Can Reef Buffer be used if the pH is already stable?
If pH adjustment is not needed, consider using Reef Builder to enhance alkalinity instead.

Peter Coleman –
Used Reef Buffer in my 55-gallon reef tank after a pH drop. It brought the pH up to 8.3 smoothly without spikes. The alkalinity also increased as expected. I’ve been using it consistently for three months and the water stability has improved significantly.
Michael Sharp –
It works well for raising pH in a sensitive reef setup. I noticed a steady increase in alkalinity after one application. I still monitor pH weekly with the MultiTest kit to stay on top of changes.
Carl Arnold –
My tank had fluctuating pH levels before I started using Reef Buffer. After a single dose, pH stabilized at 8.3. The water chemistry feels more balanced now, and my corals are showing better coloration.