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<p>[QUOTE=&quot;Circus, post: 1809760, member: 51195&quot;]The slugs is a new one on me but with the copper and zinc breaking down into a corrosion surface would have the same effect as any of the powder liquid garden preps.</p><p>Yes the copper will make them blue, copper wire or pennies were at one time placed into the hole with the house sewer line to the street connection. it would kill roots from trees in the days before plastic pipe. Copper nails or a hand full of pennies buried in the roots of trees and bushes will kill them too. But the good old root killer that you pour into the toilet is faster at that job.</p><p>It will also kill fish in ponds, in higher amounts, a lot of the tank medicine for home use is some version of a copper prep.</p><p>Any small ball would work probably. the larger the more surface area to react to with the weather.[/QUOTE]</p><p><br /></p>

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