I'm not disagreeing with anyone about Duckweed - it is a mess. I like it because it's roots are short and don't get hung up in the vals or stem plants, limiting water circulation. Although it's hard to get rid of, you can get it out of a tank as long as you aren't trying to grow other floaters at the same time.
I prune mine with a serving spoon instead of a net - easier to rinse them off in the sink. And you can limit their spread in the tank with a strip of wood floating on the surface. 2" x 1/2" seems an ideal size cut about 1/16" shorter than the front-to-back depth of your tank as measured on the sides. (Tanks usually bow outward in the middle) If you need to get down and dirty working in the bottom of your tank, just slip in the wood strip and sweep the Duckweed to one end of the tank, then hold it in place with a suction cup until you're done.
Hope this helps,
Jim
I prune mine with a serving spoon instead of a net - easier to rinse them off in the sink. And you can limit their spread in the tank with a strip of wood floating on the surface. 2" x 1/2" seems an ideal size cut about 1/16" shorter than the front-to-back depth of your tank as measured on the sides. (Tanks usually bow outward in the middle) If you need to get down and dirty working in the bottom of your tank, just slip in the wood strip and sweep the Duckweed to one end of the tank, then hold it in place with a suction cup until you're done.
Hope this helps,
Jim
