Hi all of you, and Hoppy in particular. I am a newbie and want to do CO2 injection in an 80G planted aquarium. I don't want my plants to be completely slow-growing and low-tech, and I don't want them to be growing too vigorously either, as with 30ppm of CO2. [Yeah, I'm that Great Moderation guy!
] So, I'm thinking I'll go for moderation, say about 15ppm of CO2, moderate lighting. I have two questions:
(1) Does this approach seem reasonable, or am I forgetting/ignoring something important?
(2) Now the more "techy" question. MOst standard drop-checkers, set up with 4dKH, turn green at 30ppm. This works fine for those who want to keep their tanks at 30ppm CO2, but it wouldn't work well for me. I need an indicator that'll tell me (say go from blue to green) at 15ppm instead of 30ppm. So, looking at Hoppy's above post, I thought, why don't I make a 2dKH solution to put in the drop checker? The charts [ http://freshwateraquariumplants.com/...xidechart.html
] seem to say that 2dKH will get to pH=6.6 at about 15 ppm instead of 30ppm, so this should work for me, right? All I do is put 2dKH standard solution and a few drops of the indicator into the drop-checker, and voila! I calibrate CO2 to keep the solution green without going blue or yellow, just like everybody else does, but I'm keeping it at 15ppm, not 30ppm, right? What am I missing?
Thanks for your help in advance!