We are using bottled water not any city water crap , clean water , but the water we have been using was not ph tested and thats what i think it is happend by accident to many jugs of water lol we have just fixed that PH is now 6.5 . Rookie mistake could that be why ??? when u set say a 5 gallon jug of water to its right Ph level after it sits for awhile do u have to check it again or do u have to check it everytime u water?