are detritus worms harmful to humans
The particles shouldn't be harmful; they're likely detritus ("dust/dirt"). The brown algae is likely diatoms, and your LFS is right about them. What kind of water flow do you have, or what is you tank specs? It's best to either start a tank thread in the members forum (with a link in your signature), or just listing specs each time you have ...
Can Fish Eat Detritus Worms at Amelia Truebridge blog
