Lando,
hmmm... this is a little off the main post topic, but I was going to buy water from the 2 local fish stores when I had a child dump their dinner plate in my main tank, I went and prior to buying the water I asked if they ran copper in their system they said they did, always, both did... so I instead, set up 2x10 temp tanks with homemade IO water while I broke my main tank down...
I aksed them because someone mentioned it here, about copper being in a lot of LFS water... can you introduce other things to our home tanks from their water as well? Ick? Or does that have to have a host 24/7... Just curious... What do you need to ask about buying water from the LFS, or do I need to find one that offers RO sw water made to sell?