Poly multifilament s/would be good, especially if you can untwist it.
However, I would think tht 19,000 feet of that would be a bit problematic!
For ease and convenience when cleaning time comes, I'd make sure that it was
put in a mesh bag. Then all you have to do is lift the bag(s) out to clean,
instead of having to pull hand over hand . . .

Lee

"Pat Keith" wrote in message
...
Polypropylene multifilament twine comes 20,000 feet in a roll. Readily
available locally for $19.
Check out http://www.bridoncordage.com/balerus.html
I checked on 1/4 inch polypropylene tape and its $125 for a 19,000 foot
roll
plus shipping.