I'm in the process of planning a wildlife pond, hopefully to be built later this year or early next year, it's going to be a very rough crescent shape, aprox 3m x 2m and around 0.8m deep at it's deepest point. I'm using a flexible liner with an underlay, on a sand bed
the advice I'm looking for what's the best type of sand to use ? ie building sand, sharp sand or another type and how deep does the sand need to be ?
thankyou for reading