also, a little trial-be-error find that I discovered is that once you know what your co2 is, if you want to increase your co2 by say 25%, it is not as easy as just increasing your bps/bpm by 25%. In my tank to raise co2 by 25% I only have to raise the bubble speed by just 1/2 of that. I am sure it has to do with the factors causing co2 loss (i.e. surface agitation, etc).
450g Planted Discus Tank - Work in Process!