I saw where someone had posted a link to a chart that showed the optimum
CO2 (I think). I've just started adding CO2 to my 155g tank the other day
and I've got the PH stable at 7.0 with 2dKH and 5dGH . Odd thing is, at
night, the CO2 turns off w/ the lights, but my PH stays the same.... I'm
running at about 2 bubbles per second on the CO2. OK, so on to the
question(s):

1) Is the PH supposed to change??

2) Are the KH and GH ok at this level?

3) How long should it take before I notice a difference in the plants?

check out ...
http://www.csd.net/~cgadd/aqua/art_plant_co2chart.htm
Bob
"LeighMo" wrote in message
...
. I've just started adding CO2 to my 155g tank the other day
and I've got the PH stable at 7.0 with 2dKH and 5dGH .

That's not much CO2. With a KH of 2, you should aim for a pH of 6.4 or
6.6.

Odd thing is, at
night, the CO2 turns off w/ the lights, but my PH stays the same....

That sometimes happens. At night, the plants start absorbing oxygen and
releasing CO2, so a tank full of healthy, thriving plants may suffer a pH
drop
at night. Or, if CO2 is turned off, pH may not change, the plants' CO2
production making up for the CO2 injection.

In your case, though, the problem might be that you simply aren't getting
much
CO2 into the water during the day. So there's little change with CO2
turned
off.

1) Is the PH supposed to change??

Not necessarily, if you're talking day vs. night.

2) Are the KH and GH ok at this level?

Yes, though I'd keep an eye on the KH. It tends to drop in an established
tank, due to biological processes. I wouldn't want it to drop much below
2,
for the sake of the tank's stability.

3) How long should it take before I notice a difference in the plants?

The change can be nearly instant, as far as pearling goes. But you may
not
notice much of a change, with that level of CO2.


Leigh

http://www.fortunecity.com/lavender/halloween/881/

Blake,

The site you're looking for is:

http://www.csd.net/~cgadd/aqua/art_plant_co2chart.htm

It explains the whole thing....enjoy.

Frank


"Blake" wrote in message
...
I saw where someone had posted a link to a chart that showed the optimum
CO2 (I think). I've just started adding CO2 to my 155g tank the other day
and I've got the PH stable at 7.0 with 2dKH and 5dGH . Odd thing is, at
night, the CO2 turns off w/ the lights, but my PH stays the same.... I'm
running at about 2 bubbles per second on the CO2. OK, so on to the
question(s):

1) Is the PH supposed to change??

2) Are the KH and GH ok at this level?

3) How long should it take before I notice a difference in the plants?

3) How long should it take before I notice a difference in the plants?


The change can be nearly instant, as far as pearling goes. But you may not
notice much of a change, with that level of CO2.

Could someonw please explain what pearling is ? I hear it talked about
but have
never had an explination.

Thanks

Mick

Pearling is when the water becomes reasonably saturated with oxygen and the
plants will release visible oxygen bubbles from their leaves or roots. It
occurs in moderately/heavily planted tanks after the lighting has been on
for a few hours at over 2w/g or thereabouts.

"Micky" wrote in message
...


3) How long should it take before I notice a difference in the plants?


The change can be nearly instant, as far as pearling goes. But you may
not
notice much of a change, with that level of CO2.

Could someonw please explain what pearling is ? I hear it talked about
but have
never had an explination.

Thanks

Mick

In article , Micky
writes:

Could someonw please explain what pearling is ? I hear it talked about
but have
never had an explination.

Pearling is when your plants visibly produce oxygen as a result of
photosynthesis, which chemically oxidizes water into molecular oxygen and H+
ions. Usually happens when you have lots of light and sufficient CO2.
Sometimes you'll notice small air bubbles starting to accumulate on the
undersides and/or tips of leaves, sometimes you'll see a stream of very tiny
bubbles floating to the top from a point (sometimes a hole from damage) in the
leaf or stem.

Dave Picklyk has some nice pictures on his website:

http://members.shaw.ca/davepicklyk/o2pearling-pics.html



Erica
http://members.aol.com/_ht_a/mitoem/mitoem/index.htm

"Blake" wrote in message
...
I saw where someone had posted a link to a chart that showed the optimum
CO2 (I think). I've just started adding CO2 to my 155g tank the other day
and I've got the PH stable at 7.0 with 2dKH and 5dGH . Odd thing is, at
night, the CO2 turns off w/ the lights, but my PH stays the same.... I'm
running at about 2 bubbles per second on the CO2. OK, so on to the
question(s):

snip
3) How long should it take before I notice a difference in the plants?

Some plants will show a response in 24 hours... mine did
Bob

Pearling also requires that there are sufficient macro and micro nutrients
for the plants to photosynthesize for long enough to achieve an O2
saturation in the water. I've had my newly set up tank running for about 2
weeks now (w/ mature gravel). The CO2's been running for many days now, but
have only begun to adjust the nutrient levels to where they should be. Only
after a few hours after the final dosage did I notice pearling beginning.
Now the plants (crypt wendtii and E. cord.) are pearling nicely (well the E.
cord is at least).

Jeff


"E. Mito" wrote in message
...
Pearling is when your plants visibly produce oxygen as a result of
photosynthesis, which chemically oxidizes water into molecular oxygen and
H+
ions. Usually happens when you have lots of light and sufficient CO2.
Sometimes you'll notice small air bubbles starting to accumulate on the
undersides and/or tips of leaves, sometimes you'll see a stream of very
tiny
bubbles floating to the top from a point (sometimes a hole from damage) in
the
leaf or stem.

Dave Picklyk has some nice pictures on his website:

http://members.shaw.ca/davepicklyk/o2pearling-pics.html



Erica
http://members.aol.com/_ht_a/mitoem/mitoem/index.htm