ok so i went over to my friends place cuz i was bored and he was cleaning his tank.. his yearly clean.. he already had his fish in big bucket and was scrubbing his tank in the tub.. he asked me to clean his filter.. he has a AquaClear filter.. omg it the pipe at the water comes up from.. looks like brown slim.. i got that clean, washed the sponge and carbon bag, then i rinsed out the main part and in the pic thats what i found.. im not sure what hes doing wrong but i think its over feeding.... thats what i told him anyway

