what would cause my alk to be super low? im barely showing anything when i test for it.. after i put the drops in the vile and shake it it looks pretty much just like water with a slight hint of yellow.. i change about 5-7 gallons a week, it shouldn't be that low.. maybe that's why my xenia's stopped pulsing? i think im gonna get another test kit and try with that but other than that does anyone have any suggestions?