Well I was digging around for a repair method/replacement for one of those black preformed plastic pond liners and I stumbled upon this website: http://www.billboardtarps.com. They offer used billboard tarps at what seems like a decent price. So a couple questions... Has anyone had experience fixing such a crack? Also, would the above tarp be too "risky" to use in an edible aquaculture system? If not, maybe someone envisions another use for them. Thanks in advance! I attached a picture of the crack, any help would be greatly appreciated.
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I would fix that crack from the inside using a chunk of rubber pond liner. Some sort of fish safe silicone or other high grade caulking would glue the patch in place. Patches attached to the outside of the vessel would tend to be pushed off with hydraulic pressure, while patches on the inside will be held in place and reinforced by that same pressure.
i would try bridging it with something and use that spray rubber in a can (you can buy car undercoat rubber in a can too) and coat it well first..patch..coat it again and again..and then check to see if it holds water..(clean well first)
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