Thank you Andrew and Pierre....yes that's what I was also thinking about. So I have now changed my anti-scaling chemical and now using a chemical which is supposed to be used till 5k TDS raw water treatment plant. Inlet water temperature is around 30°C and there is no pre-treatment plant  as such except sand,carbon and 2 micron filters before high pressure pump. How would I know whether I need some kind of pre treatment for my raw water? Should I get it tested in lab?

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Thank you Andrew and Pierre....yes that's what I was also thinking about.

So I have now changed my anti-scaling chemical and now using a chemical which is supposed to be used till 5k TDS raw water treatment plant.

Inlet water temperature is around 30°C and there is no pre-treatment plant  as such except sand,carbon and 2 micron filters before high pressure pump.

How would I know whether I need some kind of pre treatment for my raw water?

Should I get it tested in lab?