There are all kinds of sites with CO2/ KH / PH charts. Chuck Gadd has a
good collection ... http://www.csd.net/~cgadd/aqua/art_plant_co2chart.htm
The variables on the chart are Ph and CO2. The KH is the constant. With a
KH of 9 you have about 3.8 which is very low. Your CO2 generator and
reactor are either too small or not working properly.
Good luck!

DJay

"Akvaristen" wrote in message
news:zPa4b.312537$uu5.65589@sccrnsc04...
You are right - it was a typo KH=9. How do you calculate teh disolved CO2?

"Djay" wrote in message
...
I think your water parameters cannot be correct. KH of 0 and Ph of 7.8
results in less than 0.23 ppm of disolved CO2. Your KH (if the reading
is
correct) is DANGEROUSLY low providing NO buffering capability.
Remeasure
your parameters a couple of times. Is your CO2 system working?

DJay


"Akvaristen" wrote in message
news:GOX3b.303445$YN5.208841@sccrnsc01...
I have had poor growth in my tank - more or less from the start. I
have
had
a CO2 system in place for a month now (Nutrafin fermentation type) and
I
have always used Seachem flourish additives. Lately also the pellets
in
the
substrate. My water #'s are fine (I think) PH 7.8, Ammonia and Nitrite
0,
KH
0
GH 19(!). I have a deep 2-3" gravel bed with a layer of the fine red
stuff
(name escapes me, but was recommended by LSF for planted tank) and a
top
layer of coarse gravel. I have 14 red-eye tetra a dozen cardinal
tetra,
one
RAM and one Angel, one Siamese algae eater and one sail fin pleco.
The tank is 50 gl and the fish are doing fine. So are some of the
plant,
particularly after the CO2. I have saggataria - very long and broad,
Anubias
and cryptocyrenes. They all are doing reasonably well, but Amazons are
not.
I attach a picture of some new ones I just added. A few days later the
leaves all had holes in them. What can I do to rectify this? I have
always
used properly conditioned tap water - is it time to switch to RO?

Any advise is appreciated.

Thanks

Akvaristen

http://home.comcast.net/~akvaristen/...t-03-061-1.jpg