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Re: RO extraction
> I have a question about what RO filters remove. I had heard that they
> about everything (up to 99%) but can't get phosphates, nitrates, and
> One would need a DI unit to extract these. I tested my tap and RO water
> phosphates and nitrates (I don't worry about silicates) and found 0
> both, high levels of phosphate in the tap, but none in the RO. How is this
> possible? Can the carbon pre-filter remove phosphate? Thanks, Kevin
Well, actually, Kevin, an RO unit should remove phosphates, silicates,
carbonates, and any other "ates" in your water. Someone has informed you
wrongly. As for the carbon pre-filter, I don't know. I quit using carbon in
my box filters years ago, because the stuff that was available then would
actually add phosphates to my water.
Cichlid Trader List Administrator.