Made of thickened PVC fabric and high-transparency PVC, the pond is tear-resistant with seamless, waterproof stitching. With rust-resistant stainless steel pipes and a 200-gallon capacity, it's great for indoor and outdoor use for koi, goldfish, shrimp, crabs, etc. | Vevor | | Canvas Fish Pond 200 Gal Above Ground Fish Pond Black PVC Koi Tank, Rectangular Goldfish Tank with Clear Viewing Panel | Black with Clear Window | Best Buy