what is this worm in my daphnia culture

[techfool]

The worms are a few cms long, very thin and white. They came out of nowhere, a couple of weeks after setup. the white specks are daphnia, to give you a size comparison. Are they safe for fish to eat?
BTW it is possible to culture daphnia in a 4 litre container with no aeration or mechanical filtration. There is some frogbit in there. I used to feed yeast but it was too gunky and have now switched to powdered algae which I mix up with water and pour in, or I just stir in if I am feeling lazy. The population rises and falls but is constant enough for my bettas and vase guppies to have a weekly treat.

 

[dw1305]

Hi all,
I can't really tell from the photo but they sound like detritus worms (<"Naididae">), even if they aren't they are harmless.

BTW it is possible to culture daphnia in a 4 litre container with no aeration or mechanical filtration.

Yes it is, but they need very careful feeding. I've found the <"cultures are more stable"> if you add some dead leaves.

cheers Darrel