good? bad? how to deal with them...

[super812]

hi all, i have this tank for about 6 months and these things start to come a month ago. just wanna know what i should do with them. thanks

 

[katsafados]

Feather dusters, good, filter feeders.

 

[ophiura]

Do you mean the feather duster (which is not a hitch hiker species from the looks of it...) or the red slime with bubbles?