[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Sv: Aquatic Plants Digest V3 #759
Ole wrote to me privately about
+AD4-aquarists using ion replacement (DI?) water and then treating it with
+AD4-acid to remove the carbonates.
I+ALQ-m not sure that+ALQ-s what I wrote, but maybe I forgot ?
Wouldn't it be just as effective to
+AD4-merely treat the water with acid to remove the carbonates and leave the
+AD4-Ca +ACY- Mg in solution? (or as precipitate)
I did not advocate that, sorry. There are 2 problems with that way ( here not considering the relationship between
mono- and divalent kations)
1) While H+- from the acid +ACI-takes+ACI- the bi- and carbonates, you add the anion (Cl-, SO4-2 or NO3-, depending on whitch strong acid you choose
2) Conductivity rises (yes) and maybe you don+ALQ-t want that
I believe he meant water that has been run through an ion exchange
column. A water softener is an example of a cation-exchange column,
where Ca and Mg are exchanged for Na, or K.
Anion-exchange columns also
And are of paramount importance when you need soft water from you hard tap water.
Sure, you could treat water with a strong acid to remove the carbonates.
However, you would have to drop the pH at or below 6.35 (pK1) to convert
at least half of the carbonates to CO2.
pH+AD0-7, KH+AD0- 1 equals 4 mg/L CO2. A more common CO2 is 16 mg/L. That give a pH of 6,4 ( From Dr. G. Ritter,
TetraInformation 4/1980, Scandinavian issue (TI+ALQ-N)
Then, if you wanted a higher
pH, you would have to titrate the water back up, using a base. Not me.
Easy job if you have water like mine ( kh+AH4-16 and th+AH4-22): mix it in and aerate
And then I have to excuse everybody for the strange character set in my mails. Disky mentioned it some weeks ago, but
being a Dane, I know Danes. Much Like Americans :-) So I thought it was his old machine......
But yesterday I got 3 mess. concerning it. I don+ALQ-t know how to solve the problem. Been In W95/help,MIE(4.01)/help
and OE/help and found no help (+ACE-). Any appreciated.