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| my duckweed seems to not be growing? http://byap.backyardmagazines.com/forum/viewtopic.php?f=1&t=2234 |
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| Author: | Valduare [ Oct 15th, '07, 23:39 ] |
| Post subject: | my duckweed seems to not be growing? |
i put some duckweed in a 10 gallon aquarium tank to the point where it covered the entire surface. then i scooped it out now and then to feed the goldfish in my ap system. i' havnt scooped any duckweed out of the growing tank for 2 and half weeks now and it is not regenerating.? there are several fish in that tank and a snail. |
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| Author: | Dave Donley [ Oct 16th, '07, 00:11 ] |
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Hi V, I am also having trouble keeping the duckweed growing - had a good bunch of it on the surface to start then the bigger ones are gone now and the little ones are almost gone too. pH probably has something to do with it, as you have fish in there to provide nutrients. Ell or F&F would know; their threads have nice pictures of duckweed ponds. |
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| Author: | DanDMan [ Oct 16th, '07, 00:37 ] |
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Quote: Duckweed survives from pH 5 to 9, but grows best over the pH 6.5 to 7.5 range. Quote: Sea salt has been regarded as a good source of trace minerals to use in duckweed farming. In work in these laboratories, molasses which is a concentrated plant juice has been used to safe guard the trace mineral requirements of duckweed. Quote: As a generalisation, duckweed growth is controlled by temperature and sunlight more than nutrient concentrations in the water. At high temperatures, duckweeds can grow rapidly down to trace levels of P and N nutrients in water.
I gave up on trying to raise duck weed with P or chicken poo. I just used a hydroponic plant food and it grew like mad. The duck weed in my fish water is doing well, but it seems to grow slowly. |
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| Author: | TimC [ Oct 16th, '07, 11:19 ] |
| Post subject: | |
Put some glass or plastic over the container. They seem to like a fair bit of light and humidity. Just watch it doesn't cook. I have never added anything except seasol to the water. My azolla was doing the same thing at the start of winter, I covered it up and since then I have too much... I have been drying it and mixing it with the tropical flake. |
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| Author: | creative1 [ Oct 16th, '07, 13:38 ] |
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Bet your fish are eating the roots, though I agree with TC the temp could be an issue, different varieties prefer either cold or warm, which do you have Valduare? C1 |
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