Confusion about EI and other myths

[Tom Barr]

BTW, the ppb meter is 7000$.
Be nice to answer some low non CO2 questions, leaf differences in CO2 drop with light intensity etc.

[yme]

hmmm......

still difficult.....

isn't it easier to use a small aquarium or big bucket and fill it with an exact amount of osmosis water. add then the desired amount of carbonates (e.g. KH4).

reconnect the pH-controller and CO2 supply from "your" tank to this "test-aquarium".
and add a powerhead for some flow.

then you can play !


greets,

yme

btw: if the readings or not correct, should I adjust the slope at 30 ppm CO2 or 60 ppm CO2. I guess that since I am more in the 60 ppm range I should go for the 60 ppm....?

[Tom Barr]

Pretty much but since it is not sealed, the degassing occurs and there is a delay.
This can throw off the reading.

Best to use a sealed system and withdraw a sample from a location of interest in the tank, then allow it to equilibrate in the sealed system over time, then take a precise measurement.
This way there's no change in the gas content of the water.


You can adjust the slope at 50, 30, 60ppm etc.
It's arbitrary, but I like to check at 3 , 30, and 60ppm, or close, since these are the main ranges of interest.