ro/di membrane

Hi, does anybody know where I can buy DOW FILMTEC TW30-3012-500 in Europe? Kind regards

Brand New BRS Deluxe DI Canisters with Dual TDS meter and media installed. Never used. Bought ~ 2 months ago. Can't return to BRS because I tossed out the original packaging. Has never seen water. Shipping from 46373 or willing to meet local.

I've been struggling with red cyano again; and my corals haven't been happy for about a month. The issue I found is that my RODI membrane is putting our 36 TDS and the DI resin is only polishing it down to 8 TDS. I'm not sure how I missed this. So I've been cleaning out the cyano with water...

I bought a used BRS 6 stage RO/DI system in June 2018. I bought a BRS 6 stage replacement filter kit around xmas, it's still in the bag. Just dawned on me that kit doesn't come with membranes, my system has 2 membranes. So from what I have gathered through search feature here on R2R I've found...