Interesting Grz! I too have good results with DW and natural fertilizers and have not killed an indoor plant since I stopped using tap water from my well which I thought would be good for plants but soon turned the soil to rock ! I dont think to much water in general is good for many house plants and very rarely water them with just plain water tap or distilled without organic fertilizers! I find great results foliar feeding with DW and magnesium sulphate!