I've used Snailaway at my previous house, and will rig it up again here in my new one. Its basically an electrified fence, but it does stop the slugs from crossing the barrier. Check out the site:
The Great Little Electric Fencing Co. - Home of SnailAway and have a look at the little video
The Great Little Electric Fencing Co. - Home of SnailAway and have a look at the little video
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