elf_poop Posted July 18, 2017 Report Share Posted July 18, 2017 I have a approx. 300 gal lined pond that has a slow leak and we can't trace the source. My fiance wants to just add new liner overtop the old liner. Is that a good idea? Quote Link to comment Share on other sites More sharing options...
jvision Posted July 18, 2017 Report Share Posted July 18, 2017 If you're going to the trouble of removing all of the rock, you may as well remove the old liner as well. Keep it for other projects like a small bubbling rock feature, or a self-watering planter box. But, just to answer the question, there is no problem with just throwing a new liner on top of an old liner. Quote Link to comment Share on other sites More sharing options...
fishlover Posted July 18, 2017 Report Share Posted July 18, 2017 I was told a way to find the leak. Stop the pump to let water to sit still. Let it continue to leak. If the water stops to go down at a certain level, the leak is along the surface. Add a little water to raise the water level by a tiny bit. Pour some milk along the edge. you should see the milk goes out where the leak is. However, this method des not work for very slow leak though. Quote Link to comment Share on other sites More sharing options...
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