There are environmentally friendly pond liners that work well for natural swimming ponds. Reinforced polyethylene (RPE) is a great option since it’s durable, lightweight, and requires less material than other synthetic liners, making it a more eco-conscious choice.
EPDM rubber liners are another solid option, especially when made from non-toxic, plant- and wildlife-safe materials. Both of these liners have long lifespans, reducing waste and the need for replacements. For those looking for a completely natural approach, bentonite clay can create a watertight seal without synthetic materials, though it requires careful installation and can often lead to lots of seepage over time.
