I've been lurking for a while - finally got around to purchasing a basic spa. I've generally got a grasp on setting it up, but I'm expecting the chemistry to be a challenge due to being on well water.
We have *extremely* hard water at home. Some basic metrics (out of the well):
Chloride 26ppm
Sulfate 1100ppm
Sodium 57ppm
Magnesum 196ppm
Calcium 404 ppm
Basically total hardness is Hardness 1803 (mg/L)
Total Dissolved Solids (ppm) 1996
Alkalinity (mg/L CaCO3) 334
There really isn't anything we can do about it. For household use, we run this water through a sediment filter, a oxygenating carbon filter, a massive water softener, then a UV light. For drinking water, it's then run through reverse osmosis.
There are various attachment "filters" for spas - but there isn't any way that these will deal with dissolved solids.
I don't have metrics on water post well-treatment, but I expect that it's softer - with high mineral content (my meter measures 1100 ppm) - probably more sodium.
Any advice on dealing with water that has high mineral content? The only option I can think of is setting up an outdoor reverse osmosis system to fill the spa...