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Pond filters


Devil Dog
DP Veteran
Aug 26, 2005
Reaction score
Political Leaning
Whats the best type of pond filter for koi?
As it stands now my wife has a 4400gal pond with about 40-50 koi.
The filters I have now are one 55gal drum trickle filter, two 55gal drum bio filters
and about 60 square feet of a bog filter.

One thing I left out is its screened in with a roof.
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