| 'Best way' might vary from the circumstances of one pond to another. On a dinky rockery pool, a harsh mist spray can blast duckweed over to one side where it is easier to net floating plants out. On a larger natural pond, topping the pond up prior to heavy rain storms stands a chance of flushing the bulk of it out of an outflow On a pond with fish, stopping feeding the fish might persuade them to turn on tasty floating plants On a pond that has been devastated by invasive plants, emptying the pond, leaving it to bake in the sun can do a thorough job where neglected plants have become rampant 'Nuking' a pond of legacy problems can be a convenient time to remove surplus plants, debris, to reconsider choosing more appropriate aquatic plants | 
