Using this chart I calculated the CO2 in my tapwater. My KH is off the charts (test strips) while my pH is pretty low. The only reason I could think of was high CO2 since CO2 lowers the pH and hightens the capacity of carbonates in the water.
My question is wether this CO2 is available for my plants and wether it might harm my fish. I don't have any problems with my fish right now, but they are all pretty hardy. I do get a lot of growth, even on my anubias, though my java moss struggles.