Acid Regulator

  • Adjusts pH to the acidic range (4.5 – 5.5)
  • Softens water by precipitating calcium and magnesium
  • Use with Neutral Regulator® to target a pH


Acid Regulator™ adjusts pH to the acidic range (4.5–5.5) and softens water by precipitating calcium and magnesium. Acid Regulator™ supports the establishment of the optimal environment for all acid acclimated species (e.g. neons and other tetras, etc.). For further freshwater environment enhancement, use Fresh Trace™ to restore the proper level of trace elements and feed NutriDiet® Tropical Flakes for thriving, healthy freshwater community fish.


Use 1 level teaspoon (5 g) for every 40 L (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®. To target a particular pH use in combination with Neutral Regulator® following the chart. This chart assumes the use of unbuffered water (RO or DI). If water is already buffered use the chart as a starting guide. Use Prime® to dechlorinate tap water before doing a water change.

To target a particular pH use in combination with Neutral Regulator™ following the chart

Neutral Regulator Acid Regulator pH
1 1 6.8
1 2 6.4
1 3 6.2
1 4 6.1
1 6 6.0
1 9 5.8

Contains phosphate buffers and conditioning agents. Safe for all freshwater fish acclimated to acid pH.


50 g, 250 g, 500 g, 1 kg, 4 kg

A: Yes, it won't harm your plants, however, Acid Regulator is a phosphate based buffer, so you may experience some unwanted algae growth depending on usage. For lowering pH in the planted aquarium, we recommend Acid Buffer. Acid Buffer is a phosphate/carbonate free buffer for lowering and stabilizing pH in the acid range of pH 4–6.8.

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.

A: The components of Acid Regulator and Discus Buffer are similar so both can be used successfully in your system. You can use Acid Regulator by itself to achieve a pH within the range of 4.5 - 6.8, adding slowly until intended pH is reached. We recommend using Acid Regulator in combination with Neutral Regulator or Alkaline Regulator to maintain a slight higher pH or to increase pH (if your pH is lowered to quickly, etc).

Can't find what you're looking for? Ask us a new question.

0074 Acid Regulator 50 g
0076 Acid Regulator 250 g
0073 Acid Regulator 500 g
0077 Acid Regulator 1 kg