Weedeater string is the only way to go. It does't hurt your fingers and is by far the best sounding {size .095} is best. Too short is ok but too long and you will get too much wavering sound. My bass is electrified and specialized so I can play at loud volumes. I play by pulling the stick back and forth - no fretting {fretting kills the ring of the string}
I proclaim myself the best living washtub player in the world because I have not heard anyone play one better. I would love to give up my throne to one greater. If you wish for proof then see me play at myspace.com/benmillerband and see our gig calender. Then you can come to a show.