Friedeel,
Been using either a 10 or 12 gallon, whatever maybe even rated at 100#'s bucket for powdered chlorine bucket from a swimming pool company for years and have not had zilch problems from the chloring hurting the bait.
Either go to a local town, country club pool or better yet depending on where you live to the YMCA and get your name in to see if they will save you a bucket.
I rinsed out the buckets I have with the water hose, let sit outside for some days and it has worked flawessly for me. Keep it stored where the sunlight doesn't get to it and it will outlast probably the rope tied to it.
Reelturner