Instruct: Classify an Amazon review as either positive or negative.
Query: Yup, they work.

These lead plant anchors do work. Our aquarium has large, natural colored river pebbles, so we can't really get the roots covered adequately enough to weight the plants down with them. We have freshwater anacharis plants. We were using plastic tie wraps to hold the anacharis strands together, and then stuck the bunch into the pebbles, but some strands would break off and leave a gap in the bunch. This would allow the rest of the bunch to float up and out of the tie wrap. Now they just do the same thing with the lead wrap weights, but I notice that at least it does take longer for the bunch to break loose and float to the top in loose strands. I think this is because you can wrap the lead ties a little tighter and cover a little more of the strand base by spiraling the tie up as you wrap. Oh well, it's better than the plastic tie wrap method. I gave one star off because they don't completely hold the bunch down forever, but I haven't found what will yet.