Ok i finally am setting up a QT

[akopley]

My question is...will lr be hurt by copper. I am using a 20 galllon aqua cube that has about 20 lbs of LR and i am wondering if i should just move it to my displays sump. Also do i have to QT all my fish or only the ones displaying signs of ich?

 

[arizona tech]

lr will absorbe copper thus killing the life form on the rock,qt all fish even the ones that dont show ick, so treat them all