Testing Display and QT

[Tgronenthal]

Hi,
Can I use the same test tubes to test the water in both my Display and QT?

I know for a fact tat my QT has copper in it and my Display does not.

My fear, hopefully unfounded, is that the copper in the QT will somehow affect my Display tank results.

Thanks

T

[chefgreg]

Not if u rinse/clean them well with your rodi water. If in question get seperate tube they are cheap insurance.

[chefgreg]

A good bottle brush goes a long way. I have seperate brushes for the same reason. Ounce of prevention is worth a pound of cure.