In article ink.net, "350X_Rider" wrote:
does/would lead leech into the water? it wouldn't rust... would it?

No, they are made not to rust.

what would it do? What I have is 100% pure lead... can I use it?

I wouldn't. Some people have no problems with it, others report problems.
Why do you need to use weights anyways? Plants tend to do better without the
weights, when planted in the substrate. If they have roots, I like to trim
them so there's only about 1" of roots before I plant, so the excess doesn't
get bunched up and rot. New roots will grow quickly. If they are cuttings,
cut about 1/2" or so off the bottom right before you plant to encourage new
roots to grow. If the plants float up, keep replanting and in a few days
there should be enough roots to hold the plants down for good. In closing,
just be a little patient and you shouldn't need any weights.

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"Insert witty comment here."
-John