Another how to sterilize old salt water question

[Doctorgori]

I want to recycle saltwater for phyto but I don't trust my procedure:
I use like a capful of bleach/gal - aerate - dechlor with H2O2 3%
Does this sound right?
what's weird is the bleach doesn't make it totally clear so I use bleach 1st then clear/dechlor with peroxide

Could I use potassium permanganate then peroxide?
open to suggestion, you may be succinct/brief to be clear

 

[Aqua Man]

Why not just boil it for a few minutes?

 

[Doctorgori]

Why not just boil it for a few minutes?

that's not a bad idea actually, and would work for small batches but I got buckets and buckets of old SW, I was looking for a easy way out