Usual installation (unless it's a temp installation) is to cover the liner with 12" of soil. Use a tracked vehicle, cover liner as the dirt is placed with the equipment. You cannot have equipment to liner contact or you will be patching the liner. That lengthens the life of the liner by protecting it from UV radiation and also allows for plant growth and ease in getting in/out of the pond.

Anything you put on the liner to help get critters or people out of there has a chance of puncturing the liner unless it's smooth. Chain link, etc. all can puncture the liner at the edges of the chain link.

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3/4 to 1 1/4 ac pond LMB, SMB, PS, BG, RES, CC, YP, Bardello BG, (RBT & Blue Tilapia - seasonal).