| Re: Replacing pond liner
Thank you Bugly. I presume that there are non-toxic leak-trace dyes available that will not harm the fish; I shall make enquiries. It will not be possible to see any dye emerging from the pond, as it it surrounded by a low brick wall and paving, so I assume that I would be able to see dye on the surface moving towards the leak. I had also thought about placing some small twigs or something similar on the surface to see where they head. Obviously, this would have to wait for a perfectly still day.
Thank you, also, Kayleigh. Because no surrounding ground is visible, I'm afraid it will not be possible to do as you suggest. I have, though, seen repair kits in my local aquatics centre, and am assuming that the present liner is some form of rubber which can be patched by these kits.
And thanks to you too, Tom. I shall certainly have another go at a visual and tactile search around the edge. I'm sure there must be a crack or hole somewhere.
My wife has also made a very logical suggestion: that I insert a tube into the liner, seal it well, blow air into the space behind and watch for bubbles! This unusual idea may, in fact, work as the liner edge is sealed well in mortar between two courses of bricks, and I don't think there can be any other place for immediate escape of the air. Still, I think I will keep that as a last resort.  |