I don't steadily bubble in the CO2, but let it bubble in at a good rate for 9 minutes every hour. The amount of CO2 in the water becomes saturated in the column. Some excess CO2 gets blown off, but the amount of CO2 in the water is the same every time as it's saturated. The pressure in the column rises to the point were the flow of water through it stops. Eventually, enough CO2 gets blown off or dissolves in the water that the pressure drops and the flow through it resumes. The pH drops and a good amount of aragonite gets dissolved. This method gives me stable Ca/alk parameters. Maybe I'm using too much CO2, but it's not a big waste in my opinion.
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180 gal tank, 50 gal sump, PM RFCa6 Ca Reactor, SWC Extreme 250 1A Cone Skimmer, Tunz Osmolator ATOF, Aquacontroller Apex, Aquaillumination Sol Super Blue 6 x 75w Units, Acros/Softies/LPS/Mushrooms/Zoos, Purple/Powder Blue/Yellow Tang/3xBlue Chromis/2xTomato Clown/Lawnmower Blenny
Last edited by amoreira; 02-14-2011 at 01:24 AM.
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