replacing main drain cover

[GHM]

A better way to stay on the bottom is to use an over sized belt and add some weights (the ones with holes in the middle).

ONLY IF YOUR AN EXPERIENCED DIVER AND EXCELENT SWIMMER. !!

With a weight on the pool floor if you run out of breath you just let go.

[imfignewton]

You should not add so many wieghts that you could not push off the bottom and easily glide to the top of the water. Many leak detection companies have the equipment to stay under water and would replace the main drain cover.