I bought a barely used Fluval 306 on ebay. I just received it but there's a problem. The priming pump knob is broken. I contacted the seller, who has 100% positive feedback, and it appears it must have broken during shipping. My LFS is going to get me the replacement part, but is there a way to start the filter without using the priming pump in the mean time? Apart from that, the filter is in excellent shape and I've already thoroughly cleaned it and have it ready for use, I just don't know how to get it started.