FAQ: I added Seachem Equilibrium™ to my RO/DI water and the pH changed! What's going on?

RO/DI water is, by definition, water which is extremely low in or free of buffering agents and acids. That means that there is nothing stopping the pH from shifting as a result of any addition of any product, buffer or not.  Without the stabilizing influence of a buffer, pH is prone to rapid changes even if the components being added would not typically change the pH.  Equilibrium™ does not contain any buffering agents, so adding buffers to this solution should bring the pH to your desired level.