I prefer iso alcohol and peroxide over bleach.
Iso dissolves quickly and leaves nothing and peroxide becomes water over several days.
Bleach can leave a residue or film on stuff and be difficult to remove it.
34% peroxide is easier to use, but when i can't get that, one of the big brown bottles you can get at Walmart for $1 per 10 gallons works well. Dump them in and run the system for 2-3 days then drain and wipe out. Anything that didn't come off the sides wipe down with iso.