Bigge_al
Aquarium Advice Activist
I measured my pH on my tank at about 7am and it was 8.4 then I removed the top to adjust decoration and left it off for a while at 11:45am I test the water again and found the pH to be 7.4-7.6. At first I thought I had messed up the test from the morning but after thinking about it realized I had to do 2 test to get the high reading. The first was the regular pH test and once I found that it was high I did the high pH test.
Is it possible that leaving the cover off the tank allowed the pH to fall by evaporation.
Is it possible that leaving the cover off the tank allowed the pH to fall by evaporation.