Re: [AGA Member] CO2 efficiency in hard water

["Amit Brucker" <amitb@gtek.co.il>]

Agreed!
Will increase CO2 levels only at the beginning.
Sure the PH will fall (It did once to 6.8 at 1 bubble per second.
As I decreased the CO2 levels went up again - Done this 6 months ago.
The only effect here will be to speed up the growth with I sure it will ;-).
Bottom line I still claim that (and almost sure of) is that if I had used
the same parameters and the same flora at my tank without adding CO2 the
tank would be pretty similar that what it looks like today.
At the end, my point was that in hard water conditions CO2 has a less impact
than in soft ones. This is wrong to assume but in a way I think there is
something right about it.
----- Original Message ----- 
From: "S. Hieber" <shieber@yahoo.com>
To: <aga-member@thekrib.com>
Sent: Saturday, April 24, 2004 7:21 PM
Subject: Re: [AGA Member] CO2 efficiency in hard water


>
> --- Amit Brucker <amitb@gtek.co.il> wrote:
> > Thanks!
> > Well I did increase a bit the CO2 levels...
> > I will stop aerating in a couple of days.
> > I will try to target to PH 7.0 hopefully at about 30ppm.
> > Although I still think that as for now the CO2 system
> > wasn't that dominant
> > in the process because of my water parameters - Would be
> > nice to try this
> > for a period of time (just a thought ;-))
> > I am thinking that even removing the system - thus would
> > generate a slight
> > increase in about 0.1/0.2 degrees in PH, assuming as well
> > that KH levels are
> > the same - I would end up at about 14-16 ppm of CO2.
>
> With adding CO2, you won't have CO2 levels that high --
> maybe lots of gas right out of the tap but it won't last
> for days.
>
> Try this. Let's assume normal CO2 level is 5 ppm. It's
> really lower than than but I want to leave some room for
> safety. Take some aquarium water in a glass and aerate the
> heck out of it to drive off the CO2 -- even better, also
> let it sit over night. Then check the KH and pH. Now read
> the CO2 value on the table. If it's more than 5 ppm, then
> subtract 5 from that CO2 value you got from the table.
> Treat that result of that subtraction as the error in your
> table reading when checking the CO2 levels in your
> aquarium. I'll bet with the error correction you get more
> realistic values, with or without adding CO2. Could be your
> CO2 levels are simply not very high and you need to inject
> more CO2 than you have been. Let's see what happens if you
> try the error correction value. Don't change your CO2 to
> get 30 ppm using teh error correction. Let's jsut see what
> it comes out to first.
>
> > I
> > still think that
> > plants at least the hard water lovers of them can do
> > quite well in hard
> > water conditions, even without injecting CO2.
>
> Yes, some plants (e.g., vals) can get carbon from
> carbornates in the water but it's more work for them than
> getting it from CO2. And Claus Chrstiansen, from Tropica,
> showed slides at the AGA 2003 Convention of echinodorus in
> Brazil growing in a bed of pure caclium carbonate!
>
> > But I will take the opposite approach thus - adding more
> > CO2 and even more
> > lights.
>
> No, leave the lights alone. The point of raising the CO2 to
> 30 ppm is just to see how it impacts the pH. We're just
> testing the effect. Besides, if you change too many things
> at once, it will be hard to tell what's happening and
> you'll risk setting of an algae bloom of some kind. CO2
> will have a noticeable impact even at low light levels.
>
> sh
>
>
> =====
> -  -   -   -   -   -   -   -
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>
>
>
>
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