I have to jump in here.
"Yes your pool is green, but look how clear it is!"
"Salt water systems are maintenance free - just plug them and your done (of course he had it wired for the wrong voltage)"
"You can definitely paint a pool when it is drizzling - it's waterproof paint after all" Paint blisters in a week.
"I never need to test a pool I'm maintaining - I've been doing this so long I just look and can tell what to do"
"Pool motor capacitors rarely burn out and if they do, they won't make any noise when you plug them in. It's always the bearings that are frozen" - My answer ---Maybe take off the end cap and see if the motor spins, hmmm, how could it be frozen bearings? Usually capacitor provides power to "kick" motor over so you will get humming and no turning. Maybe it's because capacitor is $40 bucks on Digikey and your trying to sell me a $450 motor replacement?
"Number one rule - if the water looks clear, it's safe to swim"
I'll think of more later...