Worm like creature

[khoifish89]

As many you have already know, I have build an above the ground koi pond. Recently I started selling koi out of the pond.

http://www.aquariumadvice.com/forums/f135/diy-above-ground-koi-pond-235516.html

This is twice now that I have notice that when I clean my pressure filter, there are worm-like creatures in my pressure filter. They are in my coarse sponge. I want to know whether or not these worm are harmful and also what are they.

 

[jlk]

Can you post pics of what you are seeing on your filter so we may be able to help with an ID?

 

[PolyptRus]

As many you have already know, I have build an above the ground koi pond. Recently I started selling koi out of the pond.

http://www.aquariumadvice.com/forums/f135/diy-above-ground-koi-pond-235516.html

This is twice now that I have notice that when I clean my pressure filter, there are worm-like creatures in my pressure filter. They are in my coarse sponge. I want to know whether or not these worm are harmful and also what are they.

Is it outdoors could be leeches not sure though or some sort of insect larvae

 

[khoifish89]

i will upload a picture or two when I clean the filter. hopefully, this weekend before the new batch of fish arrive.