Hi Oswell,  just testing a ...

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Hi Oswell,  just testing a couple of your analyses to see what the stability of your water is according to the Langelier Saturation Index, it is quite corrosive and needs to be stabilised with lime or soda ash.  You can download a programme for free from the Water Research Commission in South Africa called "STASOFT" which will enable you to determine the dosing required to stabilise your water.  You will need to enter a bit more info than what you have in the spreadsheet.