replacing main drain cover

[GHM]

.I think it will be easier if I tie the rope around my ankle...just kidding...

You still need something heavy to tie to the other end of the rope.

Anything heavy enough to hold on to will do, as long and it doesn't damage the pool surface.
I only suggested this tip as I have a hard time staying down when inserting the screws. I needed something to hang onto and hold me steady while using the screwdriver.

[imfignewton]

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). If your old main drain cover is not an antivortex cover I would look into finding one, you will probably need longer screws with the antivortex cover. Hope this helps

[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.