Copper and Inverts

[jgranata13]

I use tap water for my FOWLR, and I was wondering if it's possible to keep snails or shrimp with tap water.

I live in Toronto, and I was able to source a water quality analysis for 2013, and I found that the maximum level of copper detected was 0.0039mg/L, with the average being 0.0019mg/L. I don't know if this is all types of copper, or only elemental copper (it just says "copper"). This is, of course, before the water passes through all the pipes to get to my house (which has copper pipes).

Is there anything else in the water that would be harmful?

I have a stomatella snail and a collonista snail that came in as hitchhikers when I set up the tank five months ago and they're still alive, if that can be used as an indicator.

Thanks for any help!

[Cliff]

I would not worry too much about copper at trace levels like that.

You really have to start worrying if you use copper meds. That would certainly effect inverts