Lidewij sent this table to us, about KH, pH and CO2. I'm curious: do you mean to say all these three values effect each other? So if CO2 rises, pH drops and KH rises and vice versa?
And is that why you said we might have too much CO2 in the tent?
Saro fixed the CO2 sensor, and it's not giving extreme values, but he says he's 95% sure it's correct. It's sensing the air and not the water of course...
It's weird though, that pH is normal and KH is so high... Like I said, I read pH is very difficult to influence if KH is high, but ours just dropped right down after adding 'pH-down'.
Do you have any suggestions on how to deal with this situation?