I am begging and beseeching for help w/duckweed

A. Nonymous

A. Nonymous

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Feb 4, 2008
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I curse and rue the day the guy at the LFS was tossing duckweed out of a tank and asked, "Hey, do you want some? It's free." This invasive species has since ruined 3 of my four tanks. It's all over the place. I can't get rid of it. Now I fear I have accidentally introduced it into a new tank I was setting up. I'm tried of dealing with this. I have tried everything. I have gone through the tank and removed every shred of duckweed I could find only to find the next week that the shreds I couldn't find came back to haunt me. I have drained tanks and had them sit dry for 3-4 weeks only to find that when I filled them up, the duckweed was back and it was not dead. That tank is now overwhelmed again.

I am at my last nerve dealing with this. I'm willing to go extreme. Chemical solutions? Are there fish that eat this stuff? I'm willing to set up a species tank if necessary if I can find a fish that will eat all this stuff for me. I need any help/advice and I'm willing to try anything.
 
My filters eat duckweed, lol. You can't net it out every other day? I kinda, maybe wanted some in 1 tank but not really...Maybe my SAEs, loaches & rasboras helped
 
I have tried this. The problem is one day you look in the tank and it's gone. The next day it's gone too. The third day there's nothing. So you stop looking. A week later the tank is infested again. The stuff is like a bad penny.
 
I tried to get some to grow for me and couldn't do it...I have a couple of fast HOBs running, and where the duckweed would get tumbled in by the current my rainbowfish would eat it all.
 
I have duckweed growing in my guppy tank, the thin little roots create a great hiding spot for the fry. When it gets out of control, I scoop it with a net and feed it to my goldfish :) My Shen especially loves it, and the next day there is usually green poop all over that needs to vacuumed out, lol.

The only other advise I can give is constant vigilance.

Kristina
 
Surface skimmer attachment/s for your filters? I did successfully eradicate the stoff from one tank, but after a couple months I seem to have reintroduced it. Just keep after it until it stays gone, and watch what's on your nets.
 
toddnbecka said:
Surface skimmer attachment/s for your filters? I did successfully eradicate the stoff from one tank, but after a couple months I seem to have reintroduced it. Just keep after it until it stays gone, and watch what's on your nets.
Click to expand...

How did you get rid of it?
 
I just (patiently) scooped it out with a net when I did partial water changes until it was eliminated completely. I find that getting aggravated by duckweed or snails is a waste of energy.
 
I kept mine under control by scooping it all out with a net. Eventually I got rid of it during a tank make over. Removed all the plants, cleaned out the filters, wiped down the tank etc. Didn't even leave it sitting dry :huh:
 
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