ok little update on the powerhead (i know the title says powerump???

... must of been tired or something) went to my LFS to see if it was ok for saltwater. the guy told me it was fine and that they had allot people asking the same question so they called there supplier and they said it was fine. So everything is ok.
Now, i bought this powerhead to replace an old aquaclear 402 that was squirting out air every 5 seconds or so. thought the 402 was getting old or something. But the new one is doing the same thing, not as much but still. So i went back to my LFS to ask what was going on...
The guy told me it shouldnt be... duh!!!! and as we were discussing the matter the fact that bubbles come out of where the power cord come in the housing when i put it in the water came up. (still following me here

). Not supposed to do that the guy told me.... but all my powerheads do that, i have 4; 2 fluval (i think, there is no name on them, 1 aquaclear and the new atlas) i thought it was normal for the water to go in there and thats how the motor staid cool...
So the guy suggested to throw them away and buy new ones... of coarse... But i would like a second opinion from you guys and gals here on 3reef. Is this normal??? If its not ill try putting some silicon so the air doesnt come out. I just dont know anymore... i just want the micro bubbles to go away...
Thanks...
Marc.
P.S Or if anyone have a good suggestion on replacing the powerheads that would still give me the water movement i need please let me know