How to make an efficient water filters for fish pond?

Question

How to make an efficient water filters for fish pond?

Answer 1

bakki shower filter

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Answer 2

I made one with a kitty litter box (or you can use almost any other container that is water proof and non toxic and of about that large or larger), put a sump pump on with aquarium gravel around the sump pump and then put sponge material over that to make a pretty good filter. You will need to rinse out the sponge part once in a while when it gets clogged up. I had it go to a water fall to oxygenate it more.

Answer 3

popular methods use an electric intake pump that has a prefilter strainer to catch leaves, and globs of other plant matter and trash

the intake pump then sends the water to a sump tank where the water floes through polyester foam wool, or perhaps sand and gravel, as it settles and flows, by gravity, back into the pond

some set-ups provide a waterfall that is fed by the returning water from the sump tank

the submersible electric 'waterfall' type intake pumps are usually not expensive, and pump 200 gallons per hour....using 3 or 4 of those, each placed in various 'low-spots' within the pond allows for optimal water movement

if your pond is several 10,000 gallons, you will need a much larger group of intake pumps

...but the gravity flow sump return will still work, just in a larger scale