A favour to ask if you have a Hanna ULR PO4 reader and RO/DI

[phi delt reefer]

Originally Posted by Elias@caco3reef.com

If makes any help my last canister of my RODI is is filled with HC-GFO never though tested for it, but I will tonight and post the results. HC-GFO is labeled to remove traces of metals that is not pulled out by your regular RODI system

i would think that work quite well. Is there any issues with your ro water coming out brownish though? How long do you rinse out the gfo for your ro system?