I am building a 40K gallon IG plaster pool and wrestling with the filter choice. I am in the Austin, Texas region with fairly hard water. I was leaning toward DE but a neighbor is telling me that he cleans his DE filter once a week because if he doesn't the calcium build-up is ridiculous. I searched the posts but could not find any connection between filter selection and hard water. It has been such a problem that he has been adding softened water to the pool!!!!
Has anyone found a particular type of filter to be better at handling hard water?