Hi there,
I have a fully planted 40g tank.
I use RO/DI water with a pH of 6.10 and I recently disconnected my co2 for CRS and obviously the pH went up. Way up. With CO2 it hovered around 6.6 tank pH and now its at 7.5.
How can my pH be this high if I have a tank with 6.1 DI water thats only...