Just bleach is sound, I have used hypo.
Fill tank up with bleach in it run it out threw hose, leave it sit sit for a while if u want, I just discount di bottles, so u go from pump to hose reel connector and run it out through the hose on hose reel, once u happy it clean just keep running tap water through, I normally do at least 2 -3 full tanks, sometimes have done more, u will still be able to smell the bleach but no effect on water tds levels once u connect di bottles back up.
When u have finished, u will know how to soft wash and be posting in the general cleaning section
