Brian_Nano12g
Aquarium Advice Addict
Details, please
Yeah did some digging around and found people use those flexible cutting boards as substrate supports. I was going to buy them online but found polypropylene placemats at Target on clearance for 98¢. They work great and are easy to cut. Just cut to size and shove in the substrate to divide sections (especially where there's invasive species of plants that shoot runners) or just push them in to support heavy stone from collapsing/sinking in the substrate. Works great to keep slopes intact and to prevent them from sliding as well.