Slow leaking concrete ponds will self seal over time. Algae, biofilm and silt work their way into fine cracks. Just be patient, use a float valve to...
Thanks I just found a guy to take them he a pond rescue, he takes fish that nobody wants. When I get home I will buy some from him. It was 95 degrees...
The first think that comes to mind is whether there is some means of aeration running for the fish, such as an air pump bubbling or a pump splashing...
Thanks. I am really doubtful it is the blockwork moving... the blockwork is solid, mortared, filled in block with rebar horizontal and vertical every...