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Thread: Whitish Duckweed

  1. #1
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    Whitish Duckweed

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    I have some leaves of duckweed very pale in colour. Whitish or yellowish, is it not enough light or not enough nutrient.
    This is grown in a temporary plastic container in water placed by the window. I started with 3 pieces, it came as additional when i got a bag of other plant. since it was only 3 pieces and i'm not sure if they will survive i kept them separate. now grow until 9 separate pieces already. wondering if i should add ferts, i don't have aquatic fertilisers only normal plant liquid fert, but i dare not use that. if not i have to collect the fish waste water when changing tank water.

  2. #2
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    Re: Whitish Duckweed

    i used to have this problem , i realize its due to low photo period.
    you may like to experiment it to see how

  3. #3
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    Re: Whitish Duckweed

    Mine turned white with no water and no light, added water yesterday and they are back to a pale green again, I am using lesser duckweed.

    adding ferts wouldnt be a bad idea but I think if you go 10 hours of light 14 hours off it will come back.

    is there anything else in with the duckweed? even feeding a few pieces of flakes a day will keep it healthy, I dont dose my tanks and my DW is in a QT tank with gravel thats it.
    I am just going off what is working for me.

  4. #4
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    Re: Whitish Duckweed

    hi my experience :

    my duckweed started to turn yellow and white when i started to do more water changes for my tank full of stem plants like elodea, cabomba, tapegrass.

    I quite sure its the water column nutrients.

  5. #5
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    Re: Whitish Duckweed

    Yes. I believe it's probably the lack of nutrients or bad water. duckweed in my established tank growing better than in the temporary tank.

  6. #6
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    Re: Whitish Duckweed

    Quote Originally Posted by 43a57 View Post
    I have some leaves of duckweed very pale in colour. Whitish or yellowish, is it not enough light or not enough nutrient.
    This is grown in a temporary plastic container in water placed by the window. I started with 3 pieces, it came as additional when i got a bag of other plant. since it was only 3 pieces and i'm not sure if they will survive i kept them separate. now grow until 9 separate pieces already. wondering if i should add ferts, i don't have aquatic fertilisers only normal plant liquid fert, but i dare not use that. if not i have to collect the fish waste water when changing tank water.
    Put a fish in there, sounds like you need some nutrients...Nitrogen mainly. By adding a fish, the fish waste will feed the plants. A guppy would work well for such a setup, since they don't need filtration.
    Oh, duckweed will grow in low light/full shade, so don't think that is the issue.

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  7. #7
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    Unhappy Re: Whitish Duckweed

    Nitrogen mainly i the problem, i also seen this problem before, but after i add in a few fish, the weed grow back. now it cover up my whole tank surface.....

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