03-27-2006, 10:03 PM
Join Date: Dec 2005
iTrader Positive Rating: 100%
I've used that one before, and it does an okay job at giving me a general reading of the CO2 amount, nothing really exact in terms of ppms. I prefer to use the pH and KH relationship, and figuring out the CO2 content from the CO2 chart.
It' a little more exact. As a result, I wouldn't recommend those C02 indicators.