What do you use

[Debo]

Hello what do you use to test CO2 in your tank? I tried the little plant care mini lab by red sea. But it never registers any CO2.
DebO

[ChloroPhil]

I check my pH against my KH to determine my CO2. Check out the referrence section of www.sfbaaps.com for the chart. It's the easiest and most accurate way of CO2 measurement.

[Wahter]

I've heard a lot of bad reviews on that plant test kit from Red Sea on APD:

http://fins.actwin.com/aquatic-plants/

Here's some more info on the pH-kH-CO2 charts (note that there is a discussion that some of the chart data may be affected by buffers in the water, but it's better than nothing and certainly better than that Red Sea kit - based on what I've read about that kit). ;)

http://www.thekrib.com/Plants/CO2/kh-ph-co2-chart.html

HTH,

Walter

[Debo]

Thanks for your replies! I'll do some reading. And mark me down as another bad review for Red Sea Plant Care! 20.00 bucks down the drain!! >:(

[Debbie]

Try writing or emailing the company. Maybe they will refund your money since you aren't the only person that has complaints about their probuct. I have written companies a couple of times if I spent a bit of money on something that was crap and they snet me a check. Can't hurt to try.