Material Knife scraping cloth that is completely waterproof and safe for fish and plants. It withstands harsh environments, bright sunlight, and extreme temperatures, and will not break. Thickness and durability 0.5 mm thick, thicker than ordinary films. Tearproof, not easy to cut, and longlasting. density farming advantage Compared with traditional fish pond stocking density, and under sufficient oxygen, 1 cubic meter of canvas fish pond can raise 70 to 80 quintals of fish. Easy drain and setup Includes a water drain and a ball valve. The pool can be assembled and disassembled quickly, making it convenient for a variety of situations. Use scenarios Aquaculture operations: ideal for density fish farming in controlled environments where oxygenation is ensured, enabling efficient space use and reliable containment for species such as tilapia or carp. Temporary or portable ponds: quick to deploy for events, seasonal demonstrations, breeding cycles, or transport requirements, and easy to remove when no longer needed. Backyard or outdoor ponds: durable pond lining for home koi, ornamental, or small farm ponds, with secure drainage and straightforward setup for seasonal use. Key benefits at a glance Safe for aquatic life and plant life due to waterproof, nonbreakable material Durable 0.5 mm thickness Supports density farming under proper oxygen conditions Quick to assemble, disassemble, and drain with included components