mini filter...

[greenapple]

...is not sucking up the water....i just started running my tank without fish....last night i turned off the filter...today i turned it on and now theres no suction.....????

 

[cFish]

You may have already done this but most filters need to be primed after they are turned off. If it is a hang off the back type filter just pour some water into it and make sure that it is on full stream if it has a flow adjuster.
Hope that helps (BTW running a filter dry can burn the motor out I broke an impeller that way)

 

[greenapple]

thanx

 

[HanshaSuro]

Additionally, filters should not be turned off at night. They need to run all day every day to be effective. Not to mention that you probably don't want to have to pour water into it every morning

 

[Navyblue]

Just a note, when it is not sucking, try not to switch it on. In case it is dry at the impeller area or the impeller is stucked. Otherwise you might fry it.

I suppose it is vibrating but not sucking. If there is no slightest sign of "life" in there, it is probaly fried or there is connection problem.