See also:
Can I use citric acid to descale/clean a reverse osmosis (RO) Membrane?
Under which conditions can antiscalants cause RO membrane fouling?
What is the relationship between pH and alkalinity? How are they different? How does temperature affect them?
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?