PROTECTING OUR AIR AND WATER WITH FLEXIBLE MEMBRANE
LINERS, COVERS, AND FABRICATIONS

Aquaculture/Hatchery Liners

Liners are used in tanks or ponds which house fish in order to provide a controlled environment: one with clear water that can be treated to minimize disease and nuisance weeds.  The material must not emit any harmful chemicals.  In many cases, it must conform to FDA or other stringent requirements.  It must have excellent puncture and tear resistance, especially for farming applications where it will have to hold up to harvesting and cleaning, or where the liner is installed over a rocky surface.  The liner must be fabricated and installed so that it is watertight—preventing seepage can be a major cost savings.  Reinforced polypropylene or PetroGard VI should be considered for these applications.

The installation at the Neosho National Fish Hatchery was demanding.  MPC technicians lined a pond which was used not only to house fish, but to provide an environment that made possible recovery, restoration, and protection of a number of endangered species.  The liner had to be as wrinkle free as possible—wrinkles could harm smaller fish—so a low co-efficient of expansion was very important.  Because of a very rocky surface at the bottom of the pond, we installed 12 ounce nonwoven geotextile under the 36 mil reinforced polypropylene liner for added puncture protection.