fish.com1
Member
Hi,
I've been having a read of a lot of the topics in this part of the forum and have found that having stable co2 say at 30ppm may lower the water's pH by 1 full unit. So say the tapwater's pH is 7.6, after being added to the tank the co2 will reduce it to around 6.6. My question is when doing water changes say a 50% water change is done then the 50% not taken out is still in the tank with the pH of 6.6. Then you add 50% tapwater which has a pH of 7.6. So for a short period of time, until the co2 has lowered the pH back to 6.6, would the pH of the water be 7.1(halfway beteween 6.6 and 7.6)?
Wouldn't this change of half a pH unit stress or even kill the fish?
I highly doubt that the above is right, and i have a feeling that the KH of the water has something to do with it. Can someone explain to me how the pH remains stable when doing water changes?
Thanks.
I've been having a read of a lot of the topics in this part of the forum and have found that having stable co2 say at 30ppm may lower the water's pH by 1 full unit. So say the tapwater's pH is 7.6, after being added to the tank the co2 will reduce it to around 6.6. My question is when doing water changes say a 50% water change is done then the 50% not taken out is still in the tank with the pH of 6.6. Then you add 50% tapwater which has a pH of 7.6. So for a short period of time, until the co2 has lowered the pH back to 6.6, would the pH of the water be 7.1(halfway beteween 6.6 and 7.6)?
Wouldn't this change of half a pH unit stress or even kill the fish?
I highly doubt that the above is right, and i have a feeling that the KH of the water has something to do with it. Can someone explain to me how the pH remains stable when doing water changes?
Thanks.