Place the lid on the container to prevent splashing while you bring the duckweed home. Between 50-100 duckweed pods will be enough as they will grow and multiply quickly.
Potassium permanganate can be bought at your local pharmacy. Disinfecting the duckweed will make sure that it is free of pests and bacteria.
You need to use freshwater as duckweeds are freshwater plants. This is why they only grow in ponds and not at sea. Salt water will kill the duckweed.
If you can’t put duckweed near a window that receives 10 hours of sunlight, you can also use fluorescent light bulbs to help them grow. For best results, place the light bulbs 15 inches (38 cm) above the tray. The duckweed won’t grow under these light bulbs as well as it would with direct sunlight.
It will take 10 days or so for the duckweed to multiply.
Duckweed requires no further care or maintenance once it’s in your pond or aquarium. You can get a suitable net in your local garden store.
Buy some litmus paper at your local pharmacy. If the pH of your pond is too acidic, use baking soda at a rate of 1 teaspoon for every 5–10 gallons (19–38 L) of water. Do this until the pH reaches the 6. 0 to 7. 5 range. [7] X Research source
You might be able to buy large tanks of freshwater from your local garden store. If not, you can use tap water.
Duckweed grows best in dechlorinated ponds.
50-100 duckweed pods will be enough. You can also use plastic drinking bottles to collect the duckweed. Just make sure you’ve properly washed the bottle out beforehand.
If you’re putting other plants in your pond, pick plants that don’t require plenty of sunlight. The duckweed will block most of the light from entering the pool. Duckweed requires no further care or maintenance once it’s in your pond or aquarium.
