The PondXpert TripleAction 6000 Evolve pump is our bestselling "All-in-One" Pump. A powerful all-in-one pond pump is a multi-functional underwater solution that combines a pond filter, pond UV & pond pump in one single submersible unit. The PondXpert TripleAction 6000 Evolve pump is our best value, powerful all-in-one pond pump is a multi-functional underwater solution that comes at a super low price. A strong, reliable all-in-one pump designed for a maximum pond size of 6,000 litres (no fish) or 3,000 litres (goldfish).