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Organic pool in subtropics- need some help identifying the best plants for keeping the pool clean?

 
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Hello Everyone!

I am from Kilifi, Kenya, which is a costal region. I am not sure what information you would need to know to give me an answer so I just copy pasted the geography and climate section on wikipedia:

https://en.wikipedia.org/wiki/Kilifi#Geography_and_climate

(The weather is generally warm throughout the year (above 25 °C) with two seasons of moderate rainfall (about 800–1000 mm). Long periods of rain start around March and last into July, while the short periods start around October and last until December.

The terrain is generally flat with sandy-loamy soils. Common trees include Cocos nucifera, Anacadium occidentale, Azadirachta indica, and Mangifera indica.)


The pool is planned to be 3-3.5m wide and 6-6.5m in length. This is being added incase the space has any factor or role play. If there is anything else you need to know to give me a more refined answer please let me know!!

Regards,

Alex.
 
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A quick search at google said these are popular floating plants though I don't know which ones would be subtropical:

Water Hyacinths (Very beautiful and extremely fast growing)
Water sprite.
Water lettuce.
Pistia stratoides.
Salvia Natans.
Mosaic plants



Maybe doing google for each plant.
 
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I always think of Cattail for cleaning water.
It's also useful food and material.
 
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For cleaning water you'd want approx 1/3 of surface covered in plants. Preferably some sedges, (look almost like papyrus, less feathery tip) . In that size pool, on a shallow side you could use dwarf papyrus. As well as the surfaces stabilizers like water lilies, duckweed can also clear nutrients nicely, if azolla isn't a declared weed there it may also help.
 
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