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Homemade pond filters
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Robs    Posted 04-07-2004 at 04:45:50       [Reply]  [Send Email]
I would like a design for a homemade pond filter. I submerged an old fiberglass boat approx 16' x 6' x 3' at the stern. It works great the pond has been established for about 3 years. we keep gold fish and have many pond and bog plants. I have a in pond pump for a fountain head but requires weekly cleaning. I was thinking of an external filter made out of three 5 gal pails linked together the first filled with pea gravel the second charcoal and the third masons sand. Does anyone have experince with this type of system?? I would appreciate any and all help. Please feel free to e-mail to me any designs.
Many thanks

Willy-N    Posted 04-07-2004 at 06:48:00       [Reply]  [No Email]
For one that size I would use a old pool filter with a Replaceable/Washable Filter Cartige. You can get them cheap. The kind they use on those above ground plastic pools should work great and come with a pump too. Mark H.

Bkeepr    Posted 04-07-2004 at 05:50:09       [Reply]  [No Email]
We run a bio filter with our pond, and have with our various ponds over about a dozen years or so. Your idea will work, but 15 gallons won't make that much of a difference. Our current bio filter is about 35 gallons, and I think that's about the smallest that'll be effective.

Ours has a standing pipe through the middle, water is sprayed into the top of the pipe, out through holes in the bottom of the pipe, then percolates up through a layer of coarse gravel, then pea gravel, then some fine commercial filter media. Finally, we float water hyacinths on the surface, just prior to the water running downhill back into the pond. We've filtered up to 1,000 gallons with several koi and many goldfish with this setup. It takes about two weeks for the bacteria to establish in the filter at the start of every season, but after that it keeps things crystal clear and aerates and cools the water pretty well during the hottest summer months.

I drain a few gallons from a drain in the bottom weekly to get the muck out, and use that as fertilizer in the garden. I pre-filter the pump through a coarse strainer just to keep out the stuff that'll stop the impeller.

good luck,
Tom A

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