shrimp swimming at the surface
so just last night i changed the filter on my 5.5 gal shrimp tank to a zoomed 501 with the spray bar. There are both cherry and CRS shrimp in there all the cherry are juvi and CRS mostly adult with about 5 juvie. anyways when i woke up, all the cherry shrimp were swimming up at the surface like they were drunk. they were spinning and twirling around. i thought there might not be enough air for them or something so i raised the spray bar so the streams would break the surface, but the thing that was odd was that it was only the cherry shrimps doing this. any ideas? also the spray bar seems to have a lot more flow what should i do to reduce this?