Just curious where you find this. I am fairly newe to Planted Tanks and yes I see that many people keep their CO2 in the 25-30 range but every and I mean ever article you read about fish always saw to keep the CO2 under 20.
Ah, the reason why I'm asking.
I have pretty good results so far at about 17, and I don't know if one bottle of DIY will get me to 30. My reactor can handle the current load, but I'm thinking if I add another bottle, it will push larger bubbles out of the bottom of the gravel vac tube.