Typo fixed 6.5 now 6.0, same comments.
Advise you get a low/high end PH test kit, should test PH as low as 5.PH or lower.
Messing with PH, KH and GH unprepared is foolhardy.
I would be very careful with info from a LFS
, from almost anybody for that fact without double checking it for accuracy.
Sudden fluctuations in PH are DEADLY!
Beware of crabs....
Advise you get a low/high end PH test kit, should test PH as low as 5.PH or lower.
Messing with PH, KH and GH unprepared is foolhardy.
I would be very careful with info from a LFS

Sudden fluctuations in PH are DEADLY!
Beware of crabs....