Blue Thumb 4x4 Fountain Basin pond underlayment MPN: 73960

MPN: 73960

From simple ponds to more elaborate designs including streams

The dual Bio-Tech filter mats support both mechanical and biological filtration

and the swirl chamber at the bottom of the filter slows

Dimensions: 17" x 8" x 4"

Blue Thumb 4x4 Fountain Basin pond underlayment MPN: 73960MPN: LA4000 Made in Saginaw, Michigan, Blue Thumb's innovative GFRC Fountain Basins include a flat, supported top deck with recessed plumbing channels for hose and a pocket for a manifold. They are designed specifically for use with lighter fountains such as our handcrafted Glass Fiber Reinforced Concrete Fountains. Note: Please follow your specific fountain kit specs for the recommended basin. Heavier point loads such as with vase fountains or real