The simpliest and most nature friendly way to prevent and reduce Algae growth in your pond is to add Anacharis Plants to your pond.
Anacharis Plants are underwater plants that use up the nutrients that would otherwise feed growing algae.You've likely seen these in fish aquairums. It's highly recommended that every pond have some Anacharis.For all those that have Koi fish in their ponds, keep in mind that Koi fish tend to eat Anacharis plants so you'll want to include some form of plant protection.
Anacharis.jpg (JPEG Image, 428x342 pixels)
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