co2 kh/ph chart and phosphates

[timwag2001]

how much does P affect the relationship of kh/ph and co2 and in which direction? if i have 3 ppm of phosphate and my kh/ph indicates i would have 30ppm co2, would i have more or less co2?

 

[coach_z]

I didnt think that Phosphate had any affect on kh/gh/ph/co2

 

[jpappy789]

Me neither...unless my chemistry is off, which it very well could be. I always thought the main problem with the charts were "unknown" acids/bases in the water that could throw everything off.

Drop checker might be the best solution...

 

[timwag2001]

copied from csd.net

Adding certain "pH altering additives" can cause much confusion as well. Additives like "Proper pH 7.0" which force the pH to a certain value completely invalidate the CO2 / KH / pH relationship. This is because these pH altering additives contain phosphates. Phosphates replace the carbonates in the buffering system. And the CO2 / KH / pH relationship is only valid in a system that is buffered by Carbonates

 

[coach_z]

Drop checker might be the best solution...

:iagree:

 

[timwag2001]

i have trouble seeing the color on the drop checker.
i'm kinda toying around with another idea. let me know what you think
http://www.plantedtank.net/forums/g...n/95235-drop-checker-new-idea.html#post927307

 

[coach_z]

depending on your $$ you could get a PH monitor to regulate your PH/co2

 

[timwag2001]

i do have a ph monitor. thats what i'm talking about. if i put a ph monitor into a drop checker that has 4dkh solution in it. i can then use the kh/ph chart to get an exact reading of co2. that way my drop checker can controll my co2 in my tank and give me a more accurate reading on my co2 instead of vague color changes that i have trouble reading anyway.

 

[dundadundun]

i think it's more than worth a try. go for it, sounds reasonable. let us know what you find out.

 

[coach_z]

i surely do not follow...but, GOOD LUCK!

edit: how many drops do you put into your DCer