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Iridized glass - Safe?

I want to replace the gravel in my fish tank with "flattened marbles", I believe you call them glass gems. Problem is I will need about 50 pounds of these, so bulk pricing is essential. I've found a few places in the US (McGills, Alamo Toy, US Marbles) but shipping costs are fairly high.

So I went looking locally and found bags of decent looking gems at the Dollar store. Problem is all the decent looking ones were iridized. These are all made in China, so I'm concerned that safety is not their main concern. I don't want these things leaching Copper, Lead or some other toxic chemical into the water. How is glass iridized?

I think Walmart carries these things too, but probably still made in China. Although my might have a greater selection of the non iridized variety. Cobalt Blue is preferred.

TIA

Reply to
Bill Stock
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yes, they are safe. it's most likely a tin coating, and it won't dissolve.

Reply to
Charles Spitzer

try glass crafters in Fl for any color, irridized or non(retail sales). Also, the rock shops carry these by the pound in NC, try a search.(i know the one in downtown Franklin had the best price a few years ago)m

Reply to
Michele Blank

oh, we call them globs as often as anything else. "Michele Blank"

Reply to
Michele Blank

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