chelated or non-chelated copper

[jeffsfish]

I need to set up a new q-tank and dose my fish with copper. Should I use chelated or non-chelated copper? Which one is less stressful on the biological filter?

 

[TerryB]

Why are you using copper on your fish? Do you treat all new fish with copper? ): If you must use copper then Cupramine by Seachem is superior to all other copper-based products IMO. Copper may inhibit the biological fliter a bit, but it won't destroy it.

Terry B