Half Off Ponds MatrixBlox Pond Free Waterfall Reservoir Block, 31.5 Gallon (28" x 17" x 15.5")

Dimensions: 28" x 17" x 15.5". The Half Off Ponds MatrixBlox Pond Free Waterfall Reservoir Block is engineered for placement in lined excavations to form weight-bearing, underground water storage reservoirs. Each block provides 31.5 Gallon capacity and features 96% void space, so more water is stored in a smaller volume, reducing the total basin size. Units lock together quickly and securely, allowing stacking at any number of levels and arranging in virtually any configuration to suit nearly any basin design. Once assembled they support landscaping, pavers, gravel, or sod, and are ideal for bog construction—creating settling chambers beneath natural plantings for use with active bog filters.