Zinc in RO/DI water

Randy Holmes-Farley · Aug 14, 2018

You're welcome.

Happy reefing.

tastyfish · Aug 14, 2018

Worth considering for a zinc source. I believe you have more Zinc based PVC stabiliser use in the US vs europe (seems to be tin over here): http://www.pvc.org/en/p/calcium-zinc-stabilisers

Victoria M · Aug 14, 2018

What??? I never even considered that?

Randy Holmes-Farley · Aug 15, 2018

PVC and float glass (it is floated on molten tin) both are possible non-metal sources.

The joys of chemistry.

NY_Caveman · Aug 15, 2018

Yeah it is a bit needle in the haystack and no way to easily test except for more ICP-OES tests. I am not too worried from what you are writing. Thanks Randy!

Randy Holmes-Farley · Aug 15, 2018

You're welcome.

Happy Reefing.

dantimdad · Sep 19, 2018

Hose clamp?

Have a customer that had some kill everything in a tank.

Also, if you have children, look for a penny. They are made mostly of zinc.

NY_Caveman · Sep 19, 2018

I have kids, but no pennies. I have not found anything and tank is a new setup, 2.5 months in. I have a 3D printed probe holder whose magnet is probably the most likely culprit if it is a magnet leaching. I raised it above the water line (it had been submerged) and the probes are still deep enough.

tastyfish · Sep 20, 2018

NY_Caveman said:
I have kids, but no pennies.

Aint that the truth! lol

zalick · May 28, 2021

NY_Caveman said:
I have kids, but no pennies. I have not found anything and tank is a new setup, 2.5 months in. I have a 3D printed probe holder whose magnet is probably the most likely culprit if it is a magnet leaching. I raised it above the water line (it had been submerged) and the probes are still deep enough.

Did you ever figure this zinc issue out? My ICP test just came back with 14.63 zinc. There is no PVC after the RO unit and nothing metal in not touching my poly storage container.