I thought after starting the new pond evoraption was my problem but its been getting worst 2 to 3 inches a day pond 7500 gallons. Its been raining every day here so I decided to shut down the falls today after filling the pond early this morning. At 2 today I looked at the pond it was full but the falls had drained to the bottom. After taking it apart I found a chipmunk had chewed through the liner- little bugger. I'm taking a 150 gallon horse watering trough to replace the liner that is chewed in the far corner away from the falls. At least I can get some height out of the falls now. What a pain!