I have had three of these.
One was like yours, so I returned it and got another that worked fine. It is still working perfect.
Another randomly started screaming like a vacuum. So, threw it out the balcony out of sheer frustration (not joking).
The third broke about two days ago. Just broke. Was working fine and just shut off. Can't get it back working.
They are neat little things and I am mainly drawn to that spray bar (my bettas love playing in it). But, they suck. They really do. Not worth $17. Go return it if you can or throw it out a window.
55gPLANTED:Rainbows/Loaches/Garras|30gVIV:Crestie|20gL:Leos|10g:Pearl Fighter|5g:Betta|5gChi:Spark Gourami/Badis|5g:ADF|2.5g:Betta|2.5g:Betta|