Drain Smart 12" 3-pack ** See the new "Drain Smart 9" 2-pack" ** Keep your deck or surface clean as Drain Smart stop soil and dirt migrating out of the pot. No more need to for messy and bulky gravel, bark or packing peanuts. Simply trim disc to size and place in your pot then fill with soil and plant that's it! Use the discs to promote healthier, stronger plants as Drain Smart's proprietary technology helps prevent root rot through improved drainage.