TetraPond AA5681 Sludge Reducer 40oz Tub glue trap Our 3 foot open tunnel comes Our 3 foot open tunnel comes equipped with a detachable chute that can be a challenging obstacle for your pal to master 【⭐Radius Up to 500m】Focuser Wireless Electric Containment System Will Create A Boundary With Adjustable Levels of 10 100 Tetra Pond Sludge Reducer Blocks contain billions of beneficial bacteria and enzymes that quickly break down the unsightly wastes that accumulate on the bottom of ponds as a sludge layer The blend of bacteria and enzymes is beneficial for developing and maintaining the pond's biological balance resulting in a cleaner and clearer pond