Seachem Acid Regulator 250g


Seachem's Acid Regulator corrects pH to the acidic range (4.5-5.5) and lowers the water's GH by precipitating calcium and magnesium, creating the optimal environment for all acid acclimated species of fish. Contains phosphate buffers and conditioning agents. Safe for all freshwater fish acclimated to acid pH. Not for use with saltwater fish.


  • Uses calcium and magnesium to adjust the hardness of your aquarium's water.
  • Creates a pH environment that is more acidic for fish that are naturally acclimated to acidic waters.
  • Can be used in conjunction with Seachem's Natural Regulator for targeted pH values.


  • Provides optimal conditions for fish that require acidic conditions.


  • Use 1 level teaspoon (5g) for every 40L (10 US gallons) daily until intended pH is reached.
  • For precise dosing use the Seachem Digital Spoon Scale.
  • Thereafter, use once a month or with water changes as required to maintain pH.
  • To raise pH, use Neutral Regulator.

What's in the box:

  • 1-50g Acid Regulator

Important Notes:

  • For freshwater pH adjustment only.

A: The difference is that Acid Buffer™ is a straight acid source and Acid Regulator™ is a phosphate based buffering system. Acid Regulator™ has a greater ability to maintain a pH as were a straight acid source can have a slight pH drift. When you are trying to avoid any additional phosphates I would go with the Acid Buffer™ and Alkaline Buffer® products but if that is not an issue, then the Acid Regulator™ will maintain a more constant pH.