How to make water more acidic

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To make your tank water more acidic you need to add a solution which contains hydrogen ions to your water.

Typically the most common solution used to do this cheaply is to use an acid like Sulphuric acid or add peat to your water. Adding CO2 to the water will also lower the pH but not a great deal.

  • These will reduce the KH (Carbonate) level in your water.

Other solutions

To achieve a lower pH you need to use:

Special notes

These chemicals are potentially dangerous to humans and fatal to aquarium life if used incorrectly. Please consult their MSDS sheet before using.


References

  1. MSDS for pH Down
  2. MSDS on Na2SO4
  3. MSDS on H2SO4