I just get mine from the grocery store. I get a Gallon of distilled or purified water for my Caruso setter because it is a bit cheaper- I don't think it is necessary to use Spring water for it.
verrrrry interesting. I will try using distilled water in my caruso setter. I did a concoction of oils/moisturizers and added tapwater for i can spritz. and i did notice the hardening effect. so i will wait til i pick up some distilled water and i'll try again...
Try Walgreens, or some other pharmacy. Some grocery stores have it where the soft drinks and water is, and some stores will have it in the baby/infant products section.