See also:
Can Sulfuric acid or HCl be used with the addition of Citric acid for the control of iron and other scales in a reverse osmosis plant?
Can Reverse Osmosis Antisclants Cause Membrane Fouling?
What is the relationship between pH and alkalinity? How are they different? How does temperature affect them?
Can I use citric acid to descale/clean a reverse osmosis (RO) Membrane?