accurately measuring co2 levels?
Where I'm at:
just getting into the realm of "hi tech" planted tank
-got Marineland Plant light (w/ timer & rgb lights & moon light & shimmer effect, I love it)
-effectively handled what would have been an algae bloom due to imbalance of extra light & no co2 infusion or ferts (thank you Flourish Excel!)
I've got substrate tab ferts from aquariumplants.com on their way, waitin' on the UPS man...
I want to ease into co2 infusion; I've already got pressurized co2 on hand (beer brewing) but I'm not the kinda guy that's gonna remember to turn it on and off every morning and night... so I want to go low-dose co2 and leave it run 24/7.
but, of course, I'm afraid of gassing my fishies at night... so I want to really dial in the co2 infusion accurately... more accurately than the drop checkers' "blue/green/yellow" zones.
I've seen others refer to CO2 ppm values where typical surface agitation gets you 3-5ppm, and you want to be somewhere around 20 for plants and fish to be happy... but what is being used to get the ppm values??? I can't find anything anywhere!