7 is neutral so 7.1 isn't too high and is acceptable range for those fish. Mine hangs out about there and I didn't have any problems with my tetras or corys - until Ich wiped out my tetras that is but that's a different problem.
7 is neutral so 7.1 isn't too high and is acceptable range for those fish. Mine hangs out about there and I didn't have any problems with my tetras or corys - until Ich wiped out my tetras that is but that's a different problem.