JEBO 178 protein skimmer/filter

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Dear All,

Just bot a tank to set up marine fish for my office ...

Tank size - 2 ft L x 1ft W x 1.5ft H

Added sand

Added water

Added Jebo 178 protein skimmer / filter

Qns - there is a tube hanging out of the filter .. any idea wats that for ? the instruction manual is not very clear.

It claims to be a skimmer but i see it more as a filter .. any bros using this model can advise ?

Newbie here and was told to cycle the water for 1 week .. any parameters i shd be testing , i intend to have nemo n a sea animonae inside maybe some other small fishes - dont need a chiller since the office is AC 24/7 with UPS hehehe

thanks