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Lemna Minor (Duck Weed) Aquarium Plant $3.99 Each + $3 Postage ($14 Express, $0 SYD C&C) @ Sydney Aquascapes

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We just grew out some super nice Lemna Minor, so we are having a bit of a sale this week for it!
$4 for a 5cm diameter clump of the floating leaves.

Low-high light, CO2 and Fertilizers are not needed.
Fast growing, quickly grows to cover the surface.
Floating plant, so floats on the surface.
Duck Weed is great for keeping your aquarium clean and removing nutrients from the water. Its main down side is that it covers the surface of the tank blocking light from reaching the plants below it. You can get around this by removing some or leaving a floating "ring" on your aquarium to keep them out from inside or outside it.

This is also the lats week for our snail deals, so check those out here.

If you have any questions or problems feel free to comment!

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closed Comments

  • Check the spelling of Diamitir on your listing
    Should be diameter 👌

    • Thanks!

  • @Brandingo do you have frogbit?

    • No, unlike duckweed frogbit is a weed in NSW so you cannot sell it.

      • huh? years ago during covid i bought some from a famous fish shop in sydney. i like them, thick leaves and cool roots

  • removing nutrients from the water.

    hmm, i thought nutrients are good??? then basically other plants will struggle?

    • +1

      Most stocked tanks will produce more waste than a closed system can handle, having nitrate export in the form of removable floaters is hugely beneficial

    • As jugsy said, nutrients for plants are not nutrients for fish, but yes if you have other plants these aren't particularly helpful, but fish love them.

      • ah i see. wow.. now i really hate this weed

  • +3

    Shouldn’t be allowed to sell this. It chokes up inland river systems, causing massive problems.

    • How so, of you're keeping it in your aquarium?

      • +4

        If you have duck weed in your aquarium, you also have duck weed everywhere else to. It's like the herpes of waterways.

        Source: have an aquarium, added duck weed once, now everything in a wide radius containing trace elements of H2Oalso has duck weed.

        • +1

          correct. they grow like crazy, very hard to remove as well as they are tiny

          • -2

            @CyberMurning: Add a goldfish in the tank, they will all be gone in a week. That's how we remove them if we need to from a tank.

            Also, just repeating it here from a previous comment:
            "So after seeing this comment chain, I double-checked to make sure I wasn't mistaken that this plant isn't a weed, however according to NSW:

            "Duckweeds are native to Australia and other countries and include the smallest flowering plants on Earth. They can form a dense green mat on the water surface in nutrient-rich conditions. They are an important food source for birds and aquatic animals."

            They are not considered a weed in Australia, I assume because of their small size (unlike plants like Frogbit which are similar but larger) they are easily eaten by fish larger than ~10cm.

            I haven't heard of issues with this plant in waterways, I would assume they would only be a problem in specifically water bodies too small to support larger fish but large enough to have other wildlife.

            Source: https://www.dpi.nsw.gov.au/__data/assets/pdf_file/0007/32930…
            "

            • @Brandingo: Thanks for the info. I've got a freshwater tank so no goldfish for me.

            • +2

              @Brandingo: Most river systems in NSW are full of gold fish/carp and duck weed. Both are destroying them. Please stop with the BS. You must live a very sheltered life.

      • +2

        I guess you are thinking of a cute little inside aquarium. Not everyone thinks the same. Some people might buy this to put in an outside pond? What if that pond overflows due to flooding and that overflow ends up in the street? Guess where that water ends up? Replying to Trishool

        • also if you are having them in the tank, one day you need to do cleaning water change etc, pour the water out but as they are tiny some may go to the sink and….. population explodes!

          • +1

            @CyberMurning: Ok thanks to all that replied. I was thinking of getting this but not anymore 😊

            • @Trishool: as the store say, the positive side: this can be a yummy cheap healthy endless supply for fish food!

          • @CyberMurning:

            as they are tiny some may go to the sink and….. population explodes!

            In most places, sinks empty into the sewage network. Your plants will end up at the sewage treatment plant, where the bubble aeration used in sewage treatment will kill the duckweed.

            Some sewage treatment methods actually use duckweed, they know how to contain it.

            If you empty your aquarium water into the stormwater drainage system, that usually goes to a nearby watercourse, so don't use stormwater drains.

        • So after seeing this comment chain, I double-checked to make sure I wasn't mistaken that this plant isn't a weed, however according to NSW:

          "Duckweeds are native to Australia and other countries and include the smallest flowering plants on Earth. They can form a dense green mat on the water surface in nutrient-rich conditions. They are an important food source for birds and aquatic animals."

          They are not considered a weed in Australia, I assume because of their small size (unlike plants like Frogbit which are similar but larger) they are easily eaten by fish larger than ~10cm.

          I haven't heard of issues with this plant in waterways, I would assume they would only be a problem in specifically water bodies too small to support larger fish but large enough to have other wildlife.

          Source: https://www.dpi.nsw.gov.au/__data/assets/pdf_file/0007/32930…

          • +1

            @Brandingo: Duckweed is a native Australian weed, but should be treated as invasive when it’s not in its natural range or habitat.
            It has tiny, white, barely visible flowers, spreads mainly by fragments and has the smallest flowering plants on Earth.

            Quote from NSW DPI biosecurity

    • Interesting. I guess it depends on the specific scenario. My mother in law put some in her outdoor pond for her goldfish. There's no other body of water out in the back yard where it is, and it just sits in effectively a giant terracotta pot that's been lined so it's water proof somehow. There was nowhere for it to spread so I didn't know that was even possible without it actually just visibly overflowing into another body of water. But it also didn't last long, the goldfish ate it all within days. It's been added a few times, and it was just found to not last long enough to be worth the effort haha.

      • +1

        Therein you just pointed out another issue, Carp/gold fish love eating this stuff! Imagine helping to provide a never ending food source in our river systems to carp that are a HUGE problem. Duck weed thrives in warm stagnant, to slow moving water, exactly what carp love, why feed them? What really annoys me to no end, is the people in these industries know all this and they act dumb because money is involved……
        Edit.. replying to rhino15

  • +3

    Just want to add a neg on the deal and agree that it shouldn't be sold.

    I work in 2 different catchment groups and we've had constant troubles with duckweed in basically every even slightly still body of water. It has generated 100s if not 1000s of hours of work in the last 5 years when it first started appearing. The duckweed is small enough to get stuck to a person's arm hair or clothes when they wipe them off after having their hands in their tank or pond. Over a long enough timeline it will get out. It will stick to animals, particularly water birds as they land in or hunt through water. So if this thing gets into even one pond, it's a short hop to it being in another dozen nearby in a matter of weeks.

    It is a completely different prospect to remove this stuff from a wild habitat, with a mud and leaf litter bottom, and no easy way to decontaminate your removal gear, than it is to remove from a glass aquarium.

    • +3

      Alright, I'll ask for the deal to be removed.

      • +1

        Respect +1 for listening and acknowledging.

        Looking forward to future deals from you guys. Just got a couple of little starter tanks for my kids.

    • Looks like mods answered they don't want it removed because its part of their policies not to remove deals even if they have negative comments.

      Guess best I can do for now here is expire it.

      • +1

        That's good to try and expire it! But, I think it would be better to remove it from sale entirely. If it is getting out into regions that don't have volunteers with hours and hours of spare time to remove it biweekly, it will take over and completely destroy habitat for animals that use still water.

        The two main impacts of this are, one, everything from frogs to dragonflies to small crustaceans get their only viable habitat completely choked out. Then everything that would otherwise prey on them has less food. Second, introduced animals benefit: so cane toads that have longer breeding seasons that don't necessarily co-incide with high growth potential for duckweed get less competition from native animals, and introduced urbanised animals like indian mynas that can scavenge from humans rather than take wild prey items flourish.

        This is not one of those plants that is "fine for expert use" or "fine if the user is warned", it is too good at escaping. People who know what they are doing mess this up all the time and once it's out it gets spread by wild animals who can't follow phytosanitary security protocols.

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