Purchasing RO water from Food Stores

[GreenSpottedPuffer]

I just bought some RO water from Save On foods because I wanted to do a big water change and not wait for my RO unit and tested the TDS at 3.

So I didn't use it.

I would just get an RO unit so you know you can get 0 each time.

I think most grocery store units say right on them that they only guarantee around 10 and under TDS.

I used to get bottled water delivered to me for drinking that was suppose to be under 5 but when I tested it was usually a little higher and sometimes around 15 which is higher than our tap water!