Is it possible to have too much CO2 with no fish?
In a tank with no fish, can you have too much CO2?
I need to quickly grow out some aquatic plants for a biology lab at work and was wondering if there was an upper limit to how much pressurized CO2 you can introduce to a planted tank before it adversely impacts the plants (CO2 would be off at night, aeration on). I see 30ppm referenced, but if I exceed that is there an issue with the plants?
I know there is a max saturation level that's temperature dependent, a high potential to waste CO2 and pH issues. Without worrying about that yet, can too much CO2 kill plants in a tank if there is aeration during darkness?