Re: what will happen with to mutch Co2
The plants will love the 50 ppm of CO2, and if you have algae, it will love it too. However, I don't think any of us can say for sure that we have ever had that much, or even for sure just how much we have had. Rather than play the game of "guess the CO2 ppm" I prefer to gradually increase the bubble rate until I notice that BBA doesn't restart as soon as I get it all removed. Of course I also watch the fish to be sure they aren't bothered by it either. Once I found the level of CO2, for the water circulation I had, that inhibited the restart of BBA I just started using that bubble rate as my optimum level.