building a bog filter

15 years ago

My pond is 9'x12' and 20" at its deepest part. I live in the sunny south and there is no shade around the pond. I am working on building a bog, not for vegetation, but to put lava rock in the bottom and run the tubing from the pump in the pond around to the back and into the bottom of the bog and use the overflow to feed a waterfall into the pond proper. I just can't get a picture of how to do this. I can visualize how to do a water fall. But that is because there are all kinds of instructions on how to do them. Can anyone talk me through this and warn me of possible errors I might make. Thanks

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