*Old man walks through the double doors and makes his way to the chemical shelves...*
"Hi, sir. Can I help you with anything?"
"Yeah. I've been having some trouble getting my chlorine level up this year. Is there anything that can help me keep it up? I've been shocking it every night, but I've got nothing."
"Sounds like you need some stabilizer. How big is your pool?"
"It's not too big, I'm trying to remember if I've had this problem before. I've been doing this for years, but it's only just now that I've had a problem. Wait. Come to think of it, I have had this problem a few times before..."
"Hmm..I think you should bring in a sample so that we can test it. That'll help us figure out the problem."
"Okay, thanks a lot..."
"Not a problem..."
I love this job..:-)