Savio Safe Anchor
Use with heaters, fountains, floating plant islands. Won't damage pond liners. Black color virtually disappears against pond liners. Can fill with gravel for 7-lbs of mooring capability. Contours to the bottom of the pond, preventing abrasion and punctures. Made of thick rubber with rounded edges. Wide mouth design. Nitrile, stainless steel. 8.5" diameter.