Ok, I guess I should have mentioned that my ph was 7.6 when I started the co2 and 6.4 several hours later.
And like I said, I don't have fish now, but at some point I would like to add some. Is there anyway to stabilize the DIY co2 any more than that? Maybe I should go with 1/2 a teaspoon of yeast to 2 cups sugar in stead of a whole teaspoon?
Is there a diy drop checker?