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Re: [APD] Qs re CO2 maintenance
[note the corrected Subject: line!]
>>> A popular alternative are drop checkers. Drop checkers use [...]
What do people think about a poor man's version of the "drop checker" idea,
at least until I get my hands on a nice drop checker??
1) Mix RO Right into RO water to get a dKH in the 3-5 range
2) set pH control point such that dKH + pH = 25 ppm co2
e.g.
1) Mix RO Right into RO water at the "medium soft" dosage
2) dKH test result is 5
3) so set pH at 6.75
...assumes $co2 = 3 * $dKH * 10**(7-$ph);
[perl!]
>>> Just ideas and suggestions. Nice to see a fellow Perl user on this list :)
Thanks!
Yet another stupid perl script follows.
steve
--
$ cat phkh2co2
#!/usr/bin/perl -w
use strict;
my $ph = 6.75;
my $kh;
if ( $#ARGV == 1 ) {
$ph = $ARGV[0];
$kh = $ARGV[1];
} elsif ( $#ARGV == 0 ) {
$kh = $ARGV[0];
} else {
print "usage: phkh2co2 [pH] DKH\n";
print " calculate C02 concentration from pH and dKH.\n";
print " default pH is $ph\n";
exit;
}
my $co2 = sprintf("%d", 3 * $kh * 10**(7-$ph));
print "If the pH is $ph and dKH is $kh, then the CO2 concentration is $co2 ppm\n";
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