How do I fix a preform pond that is leaking somewhere?
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anything I can do to fix this leak?
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Plastic pond? It depends on what the plastic is, as to whether or not it can be patched or chemically welded. You could re-line it with plastic sheeting, like swimming pool liners.
It sounds like you’re going to have to drain the pond, no matter what, to find the problem.
Are you sure it is leaking or is it evaporation and/or dogs drinking water? You may have to drain water and look for cracks.
Locate the leak. Use Gorilla Waterproof Patch and Seal tape. They just came out with it to compete with FlexSeal. Better product.
https://www.walmart.com/ip/Gorilla-Waterproof-Patch-Seal-Tape-10-FT/293956532?wmlspartner=wlpa&selectedSellerId=0&wl13=1779&adid=22222222227262583545&wl0=&wl1=g&wl2=c&wl3=312733913274&wl4=pla-569062274310&wl5=9021617&wl6=&wl7=&wl8=&wl9=pla&wl10=8175035&wl11=local&wl12=293956532&wl13=1779&veh=sem&gclid=EAIaIQobChMI9-L-n6Dp4QIVCv_jBx39GAflEAQYByABEgJOV_D_BwE
you need to remove all the water then there is a product which is a bit like melting plastic. you warm it up then apply over the holes.