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Re: [APD] EI dosing (Thomas Barr)

Hi! Andrew,

Well I will do as per your suggestion and keep some tap water overnight and
then check the pH level. I have not added any chemicals viz., pH up or pH
down so I guess the pH/KH/CO2 chart should give me an accurate reading. As
per the chart it shows that my tank has a CO2 concentration of 57PPM (pH -
6.5 & KH - 6) which I guess is on the higher side. Anyways I have not
reduced the CO2 level as the fishes seems to eb doing ok.

What I meant by the tank collapsing is that if the water becomes too acidic
won't it have an adverse effect on both flora & fauna?

So what do you suggest? Should I leave it as it is or should I do some



> Message: 1
> Date: Wed, 25 Jan 2006 11:04:18 -0000
> From: "Andrew McLeod" <thefish at theabyssalplain_freeserve.co.uk>
> Subject: Re: [APD] EI dosing (Thomas Barr)
> To: "aquatic plants digest" <aquatic-plants at actwin_com>
> > You need to add more CO2, that much I can tell you, does not matter what
> > dosing you do, you'll get algae with lots of light(you would do better
> with
> > 1/2 that amount) and poor CO2....... every time.
> >
> > *
> >
> > My tap water pH is about 8 and tank water pH is 6.5 with variations of
> > 0.1unit over 24 hrs. Now as far as my knowledge goes, for a planted
> > tank pH of
> > 6.5 is the ideal one. If I add any more CO2 the pH will go further down
> and
> > the whole tank will collapse.
> >
> > *
> Here is your problem - you have a misunderstanding of how CO2 should be
> delivered. You do not know the CO2 content of your water.
> There is no ideal pH for tanks to reach. In fact, as far as fish health in
> a healthy tank is concerned, pH is irrelevant; many people have pH swings of
> a full unit every night when they switch off the CO2. Why do you say the
> tank will collapse if you lower the pH any further? The change in pH due to
> CO2 does not affect the hardness of the water.
> What you need to do is measure the KH of your water. Using a pH/KH/CO2
> chart, you can then determine the amount of CO2 in your water (aim for
> 30ppm). For example, if your KH is 3 degrees hardness, then you want to add
> CO2 to reach about 6.5pH. However, if your KH is only 1 degree, you would
> need a pH of 6.0 (although in such a case, it is advisable to raise your
> KH to at least 3 degrees). If your KH was 10 degrees, then to reach 30ppm
> you would need only a pH of 7.0. If you tried to reach 6.5pH in such a
> tank, you would reach a CO2 level of about 100ppm and probably kill at least
> some of the fish in your tank.
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