[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[APD] Re: High water evaporation
>Some will disagree with me, but in theory, if you use reverse osmosis water
>which is like laboratory standard of chemical purity.
Not even close. Quality R/O membranes filter out about 95% of impurities
such as calcium, magnesium, carbonates, sulfates, etc. The exact amount of
contaminants removed is going to depend on the type of membrane used and the number
of gallons it has filtered. Removal of 90-95% of impurities would be
considered good performance for an R/O membrane, but would of course leave about
5-10% of impurities behind. For laboratory purity, you need to aggressively
filter water. R/O followed by a high quality deionization column would produce
near laboratory standard water for most applications. For absolute purity, the
"gold standard" is double distillation, which produces essentially 100% pure
water. For aquarium use, such purity is wasted effort. R/O water is certainly
pure enough for anything you're trying to accomplish, and would still require
minerals and fertilizers to be added if you want to use it for plants or fish.
Running straight R/O water on fish is never a good idea. They do need some
minerals in their water.
Aquatic-Plants mailing list
Aquatic-Plants at actwin_com