Found in return section of sump

[COCOBBALL]

First time seeing these. There are tons everywhere in return section of sump and in skimmer.

Are these bad guys?

 

[AllSignsPointToFish]

They're harmless filter feeding worms. I have them in my display tank.

 

[COCOBBALL]

They're harmless filter feeding worms. I have them in my display tank.

Thats a relief! Thank you

 

[Fishurama]

They look like detritus worms. They eat what there name suggests. The V shape gives it away. Normally dont see their heads as they live in the sand generally.

 

[homer1475]

Commonly called feather duster worms, and/or tube worms. Great filter feeders and if your seeing an explosion in growth, your feeding to much.

 

[COCOBBALL]

Commonly called feather duster worms, and/or tube worms. Great filter feeders and if your seeing an explosion in growth, your feeding to much.

I started dosing phytoplankton could this be the problem?

 

[homer1475]

I started dosing phytoplankton could this be the problem?

Yup, they feed/filter micro particles. Certainly not a bad thing, just watch what you put in the tank. If you start to see an explosion in growth, cut back on the micro foods.

 

[KJ]

They look like detritus worms. They eat what there name suggests. The V shape gives it away. Normally dont see their heads as they live in the sand generally.

Flatworm.