[Davide a Genova]

Hi, I'm a new user from Italy.
I write here hoping to get some help...I'm very curious about little "things" that appeared in my tanks a few days ago.
They resembles little range, their size is about 1 or 2 mm and they are everywhere in the tank.
I wrote in italian freshwater aquarium forum but noone was able to identify them.
Thanks for the help, I apologize for any error in the message
ps: they are not Hydra Virdis

 

[Kogo]

do they look like this?

 

[Davide a Genova]

Thanks for the answer...No, they don't look like that, I've tried with copepod, briozoa, planaria and every other parasite which usually live in tanks, but not to avail...
They resemble more little fanworm, they are attached to surfaces and don't swim.

 

[gookaluda]

They look almost like little shrimps HA HA HA, but the picture is still too unclear.
Did you introduce any plants or wild fish?