I know people should not drink distilled water alone, I am considering using it in conjunction with other sources. My well water has a very high level of TDS (1200 mg/L), and the current water system only trades calcium for other minerals. A reverse osmosis system is not practical due to low water pressure and lack of funds. EPA recommends a TDS level below (500 mg/L).

What I propose is to use distilled water only when planning to use a "sports additive" like HEED. Are any commercially available mixes going to give me a good mineral profile? I do have a big tub of HEED still to use.

Alternatively, should I use 25-50% well water to get a more "normal" TDS level, and use my mix of choice?