interesting. My friend has done a free dive course there. There is the duck poo soup layer, A layer of silt and then a layer of crystal clear and pitch black water. Not sure anything can liver under there as there wouldn't be any sunlight.
The quarry lake has at least one massive carp but my sweetcorn/jelly mix didn't work. it is murky and muddy water. Only ever seen baby rudd i think and one massive carp in it.
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