Preventing frogs freezing to death in wdlife ponds
about three years ago in the autumn I made a wildlife pond out of a bath tub and did everything I'd read you should do in terms of helpful plants, rocks etc but that winter was incredibly cold, down to at least -12c at which point I would imagine the entire pond froze. I never had the pleasure of seeing any life in the pond but when the pond thawed about a dozen swollen dead frogs floated to the top!
im now in a new garden and am very keen to have an area to encourage frogs And toads but am desperate not to be responsible for more frog genocide! Any help hugely appreciated in terms of creating a helpful wet area.