I have an S9 i just put online here and the guy I bought it from said to NOT update the firmware on the S9 I have... He said it is the old "GOOD" firmware..whatever that means...so i will leave it...On unit it says Ver1.0 What is best for the pool?....I have a second one coming this week but unsure of what firmware version will be on that unit...I'm new to this so still learning...