Why doesn't the carpet rot, dissolve, and lose its usefulness?

rtk

Paula wrote:
Do you do the sides or just the bottom?

Paula delurking

wrote in message
...

get totally synthetic foam carpet underlayment. works fantastically well,

is

extremely easy to handle, get into the hole, stays put and after 6 years

mine is

still "padding" the bottom of the pond when I walk in there. Ingrid