Thank you everyone. I was able to remove the foul smell with the bleach and using about 1/3 cup per 15 gal. I almost forgot the outside shower but caught it after draining the bleach water out and refilling with fresh water tank. The water coming out of the faucets was still smelling pretty bleachy even after a good 15-20 min so I figured that would sanitize the outside shower since we only use that for washing off feet and equipment or the dog. Tomorrow I'll drain it again and flush everything with the baking soda and hopefully the bleach smell with dissipate. At least with the strong bleach smell I can be pretty sure everything has been disinfected ??