/agree with Loc
If I remember what I read once, then anything over 200 out the tap can lead to issuses. Even putting a Brita filter on the faucet would be better than that.
tinytoon Reviewed by tinytoon on . 470PPM tap water! too much?!? the title says it all folks... I really don't want to get an RO system because of all the water they waste and slow flow rate .5gmp is NOT what I need for several large resevoirs... Is 470PPM too high? I plan on using all organic nutrients and I could just go easy on the nutes... What should I do? Rating: 5