Hal wrote:

I don't believe that is a practical idea for most of us. A grid
with spacing's close enough to prevent a child's foot from passing
through would obstruct fish viewing

Rebar and the rods to weld rebar are carbon steel and it will rust,
however I see this rusting steel as no more harmful than the steel
water pipes used in my home plumbing.

Most rusting/rotting occurs right at the water-line (because oxygen is
involved). As long as the rebar stays below the water, it won't be a
huge issue, but I agree it's ugly...
--
derek