Exactly. ^^^^ This guy gets it. I totally understand that mindset. I am a Gen Supt for a major mechanical company that employs around 10 PE's. I definitely understand the engineer ways in our work force. I am glad they have the same kind of people in the pond world too. I just wanted to say that this membrane was a designed pond/wastewater treatment membrane.

Just an average guy trying to keep up two ponds.
Main pond 9000 sq ft with 1700 sq ft island 5.5ft avg depth
Second pond 2400 sq ft 4ft avg depth