I am currently developing an anti snail/slug pot/planter. Any information you have regarding what works best for you would be greatly appreciated. Copper, pellets, sharp gravel etc? Obviously if anyone provides enough info which leads to the final product will recieve more pots then they will ever need. The pots we are currently testing are around 94% effective. This is not good enough! We all know what 1 slug can do! We are aiming for 100% before our product is available. As mentioned before, any help is greatly appreciated. Thanks.