PREVENTS SAGGING POND AND WATER GARDEN DECOR If you don't want a sagging or leaning water feature, then use this hard PVC standard grate to keep it upright and level. With the proper support from cinder blocks under its center, this platform can hold up to 300 pounds! That ability makes it ideal for supporting bubbling rocks, basalt columns, lava, stones or beach pebbles to cover or hide a catch water basin or reservoir or to create a water fountain. It also can hold vases, pottery and imitation rocks. Additionally, this black grate is used for pondless waterfall construction and different pondless water features. We recommend using cinder blocks under the grate's center for all applications. SUPPORT GRATE ONLY This products are only a support grate. Basins, reservoirs and pond liners to create water basins are sold separately. SUPPORTS WATER FEATURES AND COVERS BASINS Use these PVC grates as a water fountain base top or to hold other pond and water garden features. When covering water basins and reservoirs and used with adequate center supports, it prevents fountains or other water features from sagging. These black grates are also excellent for pondless waterfall construction and other pondless water features. PROVIDES RIGID CONSTRUCTION STRENGTH With cinder blocks beneath its center to give it proper support, these grates can hold up to 300 pounds We recommend using cinder blocks under the grates center for all applications. OFFERS GENEROUS DIMENSIONS These grates are about 12 inch thick with roughly 34 inch spacing between its lattice columns and rows. These grates are trimmed to this size, and so will have a cut edge. ALLOWS CUTTING FOR ADAPTABILITY Although these grates are made of PVC, they can be cut with a saw to revise it as needed. For example, sawing may be done to create a pump access door in it.