Anchor?

[JamisJockey]

Back when I used to tube, I would carry a small mesh bag (like a laundry bag), fill it with rocks as a wind and wave anchor to keep me on a spot. Today I grabbed some 4.4lb barbell weights at the local thrift store.....I'm thinking about using one as a tube anchor, but am curious to hear opinions on this before I haul one out on the tube. I was thinking I would use a small piece of chain through the barbell-hole, or just tie a rope right to it.
Thoughts?
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