If you get a drop checker<http://images.google.com/images?q=CO2%20drop%20checker&oe=utf-8&rls=org.mozilla:en-US:official&client=firefox-a&um=1&ie=UTF-8&sa=N&hl=en&tab=wi>you can get a constant reading of the approximate CO2 level in the water. The Red Sea one is supposed to be good and cheap, or you can buy fancy glass ones. Also, if you know pH and carbonate hardness, you can calculate PPM CO2. There is a tool for that here. http://www.csd.net/~cgadd/aqua/art_plant_co2chart.htm On Thu, Jan 7, 2010 at 11:42 AM, Jeff <jeff@gotperk.com> wrote: > Thanks Matt, I just calibrated the probe on Sunday when I installed the co2 > system and controller; Once I shake loose some more $ I will look into a > co2 > tester for the water (does anyone have any experience with this and have a > recommendation of a good one?) and I might get rid of the wet/dry and > replace it with a FX5 canister or C-530 canister filter; Just plug the > drain > hole in the bottom of the overflow and put the intake for the filter at the > bottom of the overflow that way there will not be any waterfall effect; > Thanks again, Jeff A. > > > > > _______________________________________________ > GSAS-Member mailing list > GSAS-Member@thekrib.com > http://lists.thekrib.com/mailman/listinfo/gsas-member > _______________________________________________ GSAS-Member mailing list GSAS-Member@thekrib.com http://lists.thekrib.com/mailman/listinfo/gsas-member