Creatures?

[Tavares100]

Hi all,
not sure if this is in the correct section, feel free to move it if not.
I've just cleaned my filter out and found some small 'creatures' in the bottom, i have no idea what they are or if they will cause any peoblems for the fish?
The are long and thin, it doesn't look like they have any legs or any other features really.

If anyone could tell me what they are and what to do with them that would be great.
Cheers,
Shaun.

 

[bae1994]

look like leeches to me

 

[Tavares100]

look like leeches to me

Hi,
How would they have got there and do they cause any problems or can i just leave them alone?

Cheers,
Shaun.

 

[bae1994]

sorry they may not be leeches i dont know just an idea

 

[saph.st24]

they are knat larva cases dont worry thiey wont do any harm

 

[Tavares100]

they are knat larva cases dont worry thiey wont do any harm

ok thanks.

Shaun.

 

[saph.st24]

i wish i had some left in my filter the baby koi love them