Quick question about pond liners
Hello! I'll be building my pond soon (finally!) and I forgot what kind of liner I was told to buy. What's the best kind and where is the cheapest place to order one? I need about 12' x 12'. My pond is going to be very small, only about 4'x5'. Do I just lay the liner in the hole, or do I need to put sand or a liner protector down first? (not sure if that's what they are called but I saw something somewhere that was meant to go under the liner - I just don't know if it's necessary). Thanks!