Pond owners often want their ponds to look clean and clear, looking like a swimming pool, but as Bernice Brewster from the Aquatic Consultancy told Ken Crowther, fish prefer conditions which are a bit grimy, grotty and mucky.

As summer approaches pond fish are at their most active. Being cold blooded they are busy feeding as they prepare for the next winter. The difficulty for pond keepers is ensuring there is enough oxygen in the water as aquatic consultant Bernice Brewster told Ken Crowther.