FAQ: Will Seachem Replenish™ affect my pH, GH, or KH?

Ordinary aquarium or tap water use

Replenish™ will add minerals that raise your GH, but it does not contain any buffers that would alter the pH or KH of an ordinary aquarium.  

RO/DI Water

When preparing your water for the aquarium, keep in mind that RO/DI water has an inherently unstable pH that must be stabilized with a buffer like Alkaline Buffer™ before it is safe to use in an aquarium.  Any product that is used in RO/DI water can cause a shift in pH, including products typically considered inert or pH-neutral like Replenish™.