revised 7 stage rodi reactor idea

[ddc0715]

so i got hevay metals in my tap water (ati icp tested) and in my rodi water which means its in my tank.. heres my idea.. pic one below is my set up.the resin sides are filled with the mixed media in each. im wanting to add a 3rd one and fill with cuprisorb or some other metal filtering media. thoughts?

 

[KrisReef]

Add the media canister and retest.

A polyfilter cut up and placed in a canister may also be helpful for metal collection?

It's a painful situation since these media all exhaust at some point and how will you know when that is?