Half Pond Free Block from Anjon Manufacturing. Perfect for natural bog filters, rainwater harvesting, pond-free water features and more! These blocks are less likely to clog than traditional gravel filters and hold 3 times more water than gravel.

This is the ideal product for smaller water basins, creating less labor and using less liner saves you time and money! These blocks will hold several tons of rock load, so you don't have to worry about them crushing or breaking.

•  Ideal for Pond Free systems and Bog Filters
• 97% void space to hold more water (17 gallons)in a small space
• Reduces low water scenarios & running pump dry 
• Heavy duty load capacity to support rocks, boulders, and other landscaping items
• Save time and money with less digging
• 28" x 15.5" x 9" - 17 gallon capacity - 8 lbs