Aquaculture raceways are constructed to grow algae, abalone or marine life in a controlled ecological environment. These structures entail the construction of either soil or concrete canals, incorporating artificial flow and aeration. These canals can be lined to waterproof them, without impacting the marine life housed therein. HDPE or LLDPE is normally utilised for these applications as it offers the best workability, coupled with extended life span for the structures. Aerators can be installed and the lining is mechanically sealed around these.