Re: how much RO water

[IDMiamiBob@aol.com]

Walter writes:

> I broke down and purchased my first RO unit today.  My question is how much
>  treated water do I want to mix with my well water.  My water is very hard
>  but I don't remember the exact reading and the PH is 7.6.  It's well water
>  but I don't know if that will help with this question.  The store I
>  purchased the unit from said to start with 1 part treated water to 3 parts
>  well water.  Is there a set formula or is it just done with trial and error
>  until the desired readings are met.

Okay.  Let's pick some numbers at random.  Let's say your RO water has 0 
degrees of hardness, the tap water has 20 degrees,  and you want 2 degrees.  
Since your target is 10% of your tap water's level, you should mix up 10% tap 
with 90%RO, or 1:9.  pH is a little tougher because of the interactions of 
the buffers with naturally occuring acids, CO2, and other stuff.  Get the 
hardness you want, then adjust the pH.

Bob Dixon


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