Hard to believe but the “bottled” water could be worse then your tap. You can usually use distilled water but getting
ro or
ro/
di from the grocery store or
lfs is best if an
ro/
di unit isn’t in your future anytime soon. Do you know what the
no3/
po4 levels in your tap water are?
A lot of people get
ro/
di units from ebay for around $100. Below are the 3 most popular sites:
Filter-Direct-store (seems to be most popular on this site)
The-Aqua-Safe-Pure-Water-Shop
ROfilterDepot
Also
airwaterice.com is a good place if you don’t want to deal with ebay.