Hi Jack....you know you turned into a growing monster when my back was turned....what's up with that?

Yes....they are standard solutions that you buy and include some with a ph of 7.01 and 4.01 (some ph meters require a 2 point calibration.....which I don't understand what that means but you have to use both solutions with 2 point calibration) and also tds and ec solutions set at a standard strength (i use tds 1500) to keep your meters calibrated and working correctly.