Sanitizing

I run a recirculating system with top feed sprayers in two 4x8 trays. How would you recommend cleaning the system?
H2O2?
liquid sanitizer? (this one is ment for food contact surfaces)
simple green? ( a friend of mine uses this)
bleach?
I have an Atom mister or whatever its called pumps out a very fine mist. I can douse my trays and what not using that but what do I do about my lines that have had nutrient water siting in them for about a week?

Thanks for the help!

I find it hard to believe that out of everyone who has looked at this thread that no one has an opinion about this that they can share with me.....

Are you talking about sanitizing during the grow? or after?

regards,

Bleach... ... ...

You could use a number of things, but the common recommendation/guaranteed bet is to run bleach diluted to 10% or less.

Personally, I would bleach it rather than the other things you listed. The shit works and truly kills ANYTHING. Period. Haha.