NetMax wrote:

"Mariachi" wrote in message

4) Some of the stuff I picked up was quartz. Is that ok If i want a
soft acidic tank? I've read stuff re quartz but can't remember if it is
inert or not.

I can't recall either, but I think it is inert. A drop of pH down should
test it, or chip a piece into a small glass of RO and test after a few
days. Maybe someone else can add their experience.

Quartz is silicon dioxide and it's totally inert. Much of the natural
sand and gravel we put in tanks has a quartz base, and the main chemical
in glass is silicon dioxide.

If your quartz has large veins of other minerals, it's still prudent to
test it as NetMax has suggested.

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