Hi,
If there are any good ideas out there for diy co2 I'm more than willing to try. I attempted it in the past and I would get great results for three days, then nothing. Or sometimes I would get no results. Once it backed up into the tank causing a huge mess. Since the pH was all over the place because I had no consistent results, I gave up. But I'm willing to try again! I can't get Excel around here so it's going to be expensive for me to mail order it in.