Last year the frogs ate almost all my fry.
I have build a fry pond over the weekend (two to go) and hopefully it will keep the frogs out and keep the mice and moles from drowning daily, polluting the water.
The fry is now 2cm and seems to be very happy with their new home.
19 meters x 4 meters x average 40 cm (20 cm shallow end - 60 cm deep end) = 30 000 liters.
Lets hope for the best.
Top of the liner (500 micron) still to be glued neatly to the sides of the corrugated iron sheets.