What are bucket/barrel towers?
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Like what gangster was saying. If you get some barrels and put them along side the pond and have a pump to pump water into the top of the barrel. Have the barrel filled with media. Then out the bottom have a drain hole to have the water flow back into the tank. You could have a few of them and in the top make a basket to hold some nice eye appealing plants that would make the pond look nice while filtering your water.
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