so i just bought the Penn Plax Small World Pump & Filter Kit for my 2g tank with my betta in it. i have the aqua clear mini for my 10g tank and it sucks up water and gets rid of particles and what not but for this one (Penn Plax Small World Pump & Filter Kit)... i noticed that its just blowing bubbles. and the air pump that it came with pumps the air but it doesnt seem to be filtering the particles and trapping it in the sponger part of the filter. did i just set this up wrong?? help please!