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**fishfry** · 06-29-2004, 10:46 PM

I believe that is the ADA brand CO2 quick indicator, similiar to the other ones on the market like the eheim one. I believe they do use bromthymol blue, at least the liquid in my little bottle looks like it...

06-29-2004, 10:46 PM	#3 (permalink)
fishfry Member of SCAPE Join Date: Apr 2004 Location: so cali Posts: 612 iTrader Ratings: 4 iTrader Positive Rating: 100% Plant Points: 5865	I believe that is the ADA brand CO2 quick indicator, similiar to the other ones on the market like the eheim one. I believe they do use bromthymol blue, at least the liquid in my little bottle looks like it...