Hey yıall, All my shrimp (14) spent most of the week on my filterıs outflow nozzle. They were climbing all over each other and they seemed to be feeding (but arenıt they always?) There is some deep brown algae on there, but theyıve never paid it any attention before. I have never seen them all in one place like that, and for so long to boot. Can anyone offer any insight? Thanks, Matt