Has anybody used one? Would make water changes easier on my small tank. Amazon doesn't list what it's made of but it looks like copper. other reefers have used it but thought I'd ask you good folks first.
http://www.amazon.com/gp/product/B0..._m=ATVPDKIKX0DER&pf_rd_r=01B1DRWV930RMTD5ZXYV
http://www.amazon.com/gp/product/B0..._m=ATVPDKIKX0DER&pf_rd_r=01B1DRWV930RMTD5ZXYV