tube anchors?

[CROSSINEYES]

was looking at some anchors for the new tube. what kind seems to work best. i am thinking about a canvass bag with rope. that i can empty out the weight. this way what ever i find on the bank would be my weight. what do you all think?
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[Coldfooter]

Thats what I use. A few rocks from shore in the bag and your set. Once done you dump the rocks and roll the unit and store the rope in the bag. Works like a charm!
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[hashbaz]

I have a small collapsible anchor for my canoe. Then a few weeks ago I saw some even smaller collapsible anchors at Smith & Edwards. I thought to myself "thats too small even for a canoe! I wonder what they are for?" Now I know.
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