ok so i got an air pump and air stone for my fish tank... I just got it and put it in and setting everything up. but it isn't bubbling all along the stone and the bubbles aren't really creating any surface agitation like i thought they would. is it just because the stone hasn't been used before and it needs to absorb some water first or whats going on only about 1/3 of the air stone is bubbling. can anyone help?