Don't worry, your WalMart has it, they just don't know that what they sell as do-it-yourslef bottled drinking water is also R/O water. It's what you put into your own bottles from the dispensin machine. Just ask them if they have a machine that dispenses drinking water.
Here in Gulf...
My tap water is bad .... but sure not as bad as yours.
It's expensive, but I use $1 a gallon spring water. My current forumual is 50% bottled spring water 25% tap water and 25% RO water (27 cents a gallon at Walmart). No other additives. I use Seachem Purigen and 100 micron pads in my...
I had the problem once. Turns out although my water was crystal clear, nitrates were over 40ppm What is your nitrate reading? I noticed your nitrates were high in a post you made last July. Vacuum your substrate real good.
My black beard (brush) algae problem went away with when I:
1)...