Q: I am using Liquid Acid Buffer and when I add it the pH immediately drops to around 7.1, but then the next morning has risen back to the 7.6 range.
A: The pH is likely rising due to certain gasses that are equilibrating with your aquarium water. As an aquarium matures and acids become more prevalent, they will negate any influence these gasses have on pH. That is why pH tends to drop as an aquarium matures, because of the acid production that builds over time. In the meantime, all you need is a more constant or intense acid present until enough acids can build in your aquarium to negate any influence from gas equilibration. This acid can come from our Acid Buffer or Liquid Acid Buffer, peat moss, or more fish.