Going to try out some chemistry....

[F00b4r]

CRS does add sulphate and chloride in roughly equal measure but if need to add lots it will start to favour the sulphate side. It is also quite dilute as some of these acids go.



I've used both CRS and now 75% Phosphoric acid which is very neutral tasting and doesn't influence the sulphate/chloride balance. I can then add minerals if I need to. You also only need 6-10ml depending on the grain bill so much more economical.



I've also just purchased a Salifert test kit. I think it will be useful as i can already see a variation between the test kit and the murphys water report. Thames water get a lot of their water from rivers so this can be affected by rain and dry periods.

My alkalinity can vary by 100% depending upon the weather around that week, the alkalinity test is really cheap and simple to do.