Hi, I'm trying to prime my Fluval 306 and I just can't. I've been trying for 3 hours and the blisters on my fingers from pumping the little plunger have broken open. I tried pouring water into the intake as well, I just made a giant mess. Fish keeping us the only thing I do for myself and I absolutely love it, but this happens every time I clean my filter. This time I just can't do it. I have a HOB back up running right now. Can anyone tell me what to do? I'm working in a very tight area. I'm afraid I'm going to have to give up my hobby, and I really feel like I'm failing right now.