..testing in "pools" isn't enough. You must equal the pressure applied by the ocean water as your standing in 4-5 feet of water.
10 inches of "pool" water...does next to nothing.....unless the hole is Large enough, but then you'd be able to see it...right?? The leaks I had were slow, but the deeper I went in (added water pressure)....the faster/stronger the leak. . . .
Spend the Coin.........and you'll keep a dry groin
or....
Save some cash.......End up with a Rash...
...hey, so I'm not a poet!