![]() The main benefit the pre-box-welded liners have is their cost - they are much less expensive than fiberglass, and much less expensive to ship. ![]() In fact, it is approved for human drinking water applications, so any form of fish farming, aquaponics or gardening for human consumption are also approved. Like fiberglass, our polypropylene is safe for fish, plants and humans. We are able to box-weld the liner at our facility so that it arrives in the desired shape, ready to go. We carry a 36 mil polypropylene liner that box-welds quite nicely into various rectangular or circular shapes. Box-welding is the process of taking a flat liner and heat welding the seams to create some kind of 3D shape or 'box'. Alternatives to Fiberglass Pond Linersīox-welded liners are a good alternative to fiberglass in certain situations. If you have no plans for putting fish in your pond, then water temperature fluctuations could be less important depending on your goals. As well, try to get a preformed pond with as much as depth as possible since deeper water also helps regulate temperature. This can be overcome however by purchasing a pond that holds greater than 1000 galons, or 4500 liters of water, since the larger the volume of water in a pond, the slower the water will react to temperature changes. It is for this reason that a fiberglass koi pond may not be the best idea since koi, and other typs of fish, require a relatively consistent water temperature. Often times, preformed ponds in general are simply too shallow to properly control the water temperature. On top of the cost of materials, since fiberglass ponds are rigid and heavy, the shipping costs can be many times more expensive than shipping a flexible liner.Īnother potential problem is the shallow water depth in most fiberglass ponds. Fiberglass ponds will cost much more in materials than a similarly sized pond using a flexible pond liner. The main problem with fiberglass is its expense. Possible Downsides to Fiberglass Pond Liners
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