Hi,
I’m still trying to find my way around with the CO2. I’ve calibrated the pH pen yesterday, and then found a surprising (to me!) result.
My tap water is hard, and once allowed to settle is 8.4. I’m injecting CO2 2pm to 9pm (lights 3pm to 10). The tank is around 450 litres, with a sump.
I was expecting my CO2 injected tank to be same as tap once it had gone off, and some time allowed for degassing. But, it was actually 7.8 when I measured at midday. By 5pm it had dropped to 7.5.
I’m not sure if I’m supposed to be aiming for a 1 pH drop from tap levels, or from my overnight levels?
Thanks
I’m still trying to find my way around with the CO2. I’ve calibrated the pH pen yesterday, and then found a surprising (to me!) result.
My tap water is hard, and once allowed to settle is 8.4. I’m injecting CO2 2pm to 9pm (lights 3pm to 10). The tank is around 450 litres, with a sump.
I was expecting my CO2 injected tank to be same as tap once it had gone off, and some time allowed for degassing. But, it was actually 7.8 when I measured at midday. By 5pm it had dropped to 7.5.
I’m not sure if I’m supposed to be aiming for a 1 pH drop from tap levels, or from my overnight levels?
Thanks