EMS503
Aquarium Advice Freak
A while ago f250god had done a review on the new Fluval 404 cannister filter. The filter would not run again after servicing it. We had just purchased the same filter just prior to this review and we hoped we would not have the same problem. We did, but after some tinkering with the filter my son found the cannister had to be empty of water to restart the system. Now when servicing the filter we just put it back empty of water and start the unit with the pump handle and it fills with no problem and runs just fine. f250god I hope you found this out if not give it a try it might just be the problem.