Fluval 404 self-primer

[105man]

I have experienced a major hassle trying to re-prime after having done a media change and hearing a lot of noise that sounded like air in the system. The service tech at Hagen said it's best to re-attach the canister empty of water, then use the self-primer.

I don't know if the self-primer has somehow broken down, but I can't get the canister to fill.

Any ideas? There is now no water in my intake, and I have to somehow create suction into the canister. Should I try filling it entirely with water, then use the self-primer? Or does it sound like the self-primer needs replacement?

Thanks.

 

[Marvin]

I use to have the 403 and had the same problems. Sometimes i think i could be the lines going down to the canister itself, sometimes i think its just broken. When i do have problems priming the tank, i just fill it with salt water first.