I though it might be an interesting experiment, now that my tank is very super saturated with Tannins, and ....because many aquarists believe that tannins, (and drift wood) have the ability significantly lower pH.
So I ran tests on my tank to see if the dark tea color and saturation by Tannins would actually do what many aquarists believe.
The normal pH of the tank averages 8 to 8.2.
So it looks to me, like the Tannins have reduced pH by about 0.1. from 8.2, to maybe 8.
Much of how water acts with Tannins has to do with its alkalinity (related to hardness) and how the buffering capacity of the alkalinity resists change.
Because the GH (general hardness) of my tank water is 180, and KH (carbonate hardness is also up near 180, this water resists change fairly well, so I'm not that surprised by the slight alteration, even as dark as it has become.
If anotheraquarists tap waters hardness, and alkalinity is not as high, Tannins may influence its pH much more.
So I ran tests on my tank to see if the dark tea color and saturation by Tannins would actually do what many aquarists believe.
The normal pH of the tank averages 8 to 8.2.
So it looks to me, like the Tannins have reduced pH by about 0.1. from 8.2, to maybe 8.
Much of how water acts with Tannins has to do with its alkalinity (related to hardness) and how the buffering capacity of the alkalinity resists change.
Because the GH (general hardness) of my tank water is 180, and KH (carbonate hardness is also up near 180, this water resists change fairly well, so I'm not that surprised by the slight alteration, even as dark as it has become.
If anotheraquarists tap waters hardness, and alkalinity is not as high, Tannins may influence its pH much more.