Is it safe for fish, plants, and invertebrates (e.g., shrimps) to use lead strips to weigh down my plants?

I have a Biorb fish tank that is doing very well: 7 whitecloud minnows, 3 Japonic algae shrimp, and lots of aquatic plants (elodea, moss balls, swords, sprite, etc)…however, because of the large ceramic media, it’s very difficult (and frustrating) to keep my plants anchored to the bottom.

Every day or so, I have to go back in there to re-anchor the plants between the gravel.

I have read conflicting testimonials as to whether or not the lead strips that come with my plants to keep them bunched together at the aquarium supply stores are safe for long-term use in an aquarium. I don’t want to negatively impact the environment for the fish or the shrimp…

I could use some good advice.

Thanks.
I have a Biorb fish tank that is doing very well: 7 whitecloud minnows, 3 Japonic algae shrimp, and lots of aquatic plants (elodea, moss balls, swords, sprite, etc)…however, because of the large ceramic media, it’s very difficult (and frustrating) to keep my plants anchored to the bottom.

Every day or so, I have to go back in there to re-anchor the plants between the gravel.

I have read conflicting testimonials as to whether or not the lead strips that come with my plants to keep them bunched together at the aquarium supply stores are safe for long-term use in an aquarium. I don’t want to negatively impact the environment for the fish or the shrimp…

I could use some good advice.

Thanks.

EDIT: I’ve also sound this: http://www.bigalsonline.com/StoreCatalog/ctl3684/cp18481/si1382132/cl1/penn_plax_plant_anchors?&query=plant+anchors&queryType=0&offset=

Safe, non-toxic “soft lead” plant anchors–which seem to be what are used to most fish supply stores as well.

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