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To explain the reason why it won't work... a cyclone filter's performance relies on a large relative density difference between the fluid (air/water/whatever) and the debris (dust/hair/algae/fish doo doo).

Cyclone filters work by using centrifugal force. So the denser stuff (dust & debris) is pulled toward the outside of the vortex by to centrifugal force. Only the lowest density particles in the flow (mostly air) make it to the center of the vortex, where they're sucked out by the outlet tube in the middle. While fine dust may seem very light, it is much denser than air. So cyclone filters work great at filtering air.

With this idea in mind, you can imagine how the large density of water would create problems. In most ponds filter systems, water is not much less dense than most of the contaminants you would be filtering; in fact some of the debris may be much less dense than water. So you'd have lots of fluffy low density debris making it through, and you'd probably only trap a few of the very dense items (like rocks). Even mud, which is slightly more dense than water, will still mostly make it through because it the difference in density is not great enough for centrifugal separation to work well.

Anyhow, TLDR... water is just too dense for cyclone filters to work, unless you just need to filter out very dense things like rocks.