Do you mean Mule tape, some times called kevlar or polyester pulling tape? I've never seen fish tape at 2500 pound. To me fish tape is normally a steel (sometimes fiberglass, aluminum) tape with a hook on the end, used for getting through a conduit tell you find a lost cable or new path. Though, I could easily by wrong.
Is it like white (white once upon a time) nylon feeling stuff?
If its Mule Tape hell yeah! I keep roughly 200' (was about 350' I've cut random lengths off as needed) of 3/8" measuring tape (similar to mule tape, only rated to pull about 800lb) in my Pathfinder used it to tie furniture to the top of my car, my back hatch closed, and what ever else might need tying. I've found that when making a knot double and triple knot it. Its kinda slippery, and the flat shape doesn't lend well to basic knots. I'm not a boy scout, so I only know three or four knots (maybe only 2 ways of doing the two same knots). Tie it then tape your knots, just to keep them from coming undone.
Why don't ya stick your head in that hole and find out? ~piehole
Plan for the worst, expect the best. Make the most out of it under any conditions. If you cannot do that you will never enjoy yourself. ~CrispyDave