Overview: "Marketplace is back at it again, putting home repairmen to the test. We're wiring up homes with hidden cameras, rigging a simple, everyday household problem, to find out if repairmen we invite in can figure it out. Turns out, not every repairman can diagnose the problem. This week, we wade into the world of backyard pools. In the pool business any type of handyman could show up. How would you know if they're really doing a good job? Can you trust them to fix your problem? Is your money well spent? Or will you be sunk? When it comes to testing pool repairmen, Marketplace didn't find much depth."