This Beckett 8 ft. x 10 ft. PVC Pond Liner is constructed from 20-mil PVC for durability. The liner is suitable for use with fish (not included) and is UV-resistant. Depending on the shape and size of your pond, it can hold up to 266 gal. of water. Use with the Beckett 6 ft. x 12 ft. underlayment to increase the life of your pond liner.