Not to mention other chemicals in the water can make the KH/pH/CO2 calculations or table inapplicable. Scott H. --- Rachel Sandage <rachelsor@hotmail.com> wrote: > Amit asked, "I won't use the CO2, My tap water already > comes with PH of 7.2 and KH of 10 - does this eliminated > my need for a CO2 system ??? . . . > > First, it is true that tapwater right out of the pipe can > have extra dissolved CO2. To get a more accurate reading > of your water's characteristics, let it stand in a glass > for a day and then check its pH. > > But let's assume that your tapwater has perfect CO2 > levels. You put it in the tank. The plants us the CO2 > which is in the water. They use it up - pretty quickly, > if they are growing well. Where do they get more, unless > you are constantly adding either new, CO2 rich water from > the tap or or CO2 from some other source? > > Second, according to Tom Barr, most plants aren't that > sensitive to GH/KH, and 10 should be fine. __________________________________ Do you Yahoo!? Protect your identity with Yahoo! Mail AddressGuard http://antispam.yahoo.com/whatsnewfree ------------------ To unsubscribe from this list, please send mail to majordomo@thekrib.com with "Unsubscribe aga-member" in the body of the message. Archives of this list can be found at http://lists.thekrib.com/aga-member/