I just use soap and water and scrub the fire outta it i have heard of other peop;e that pores bleach in them and lets them sit but i have never tried it
I'm sure there may be better ways but, I use a 1 big bottle of Peroxide in each side and I also add a big jar of lemon juice per side. Fill livewells up w/ water and turn on recirc pump and run it for a while before pumping out.