I took a sample of tank water to a LFS today, just to check... Nothing seems out of sorts... I just like a second opinion on my tests. The water sat in my (Michigan) car for a couple hours, so it was quite cold. LFS said the parameters were all good - except pH which was REALLY low at 7.7!
I got home and tested from the same sample, and I got the same reading - 7.7. So, I took another sample right out of the tank, and it reads 8.3, which is more like I had expected. Obviously, the biggest difference I can think of is that the tank water is 78+ degrees.
Can temperature really affect the pH like that? Or, should I be worried about something else? I change 5 gallons of my 34 gallons every weekend - so it's due... But should I be looking for something else?