Fluval 205 Leaking...now what filter?

[Kes1221]

I currently have a Fluval 205 running my salt water tank. Its about a 30gal tank. When i changed the filter media last time (about a couple months ago) it started to leak and after playing around with it it stopped. Well last night i changed some other filter media and it started leaking again. i played around with it for over 3 hours trying everything, the seal is fine, no nicks or anything.

I am not going through this everytime i want to change the filter media so my fish are happy. I am done with fluval at this point. Can anyone recommend a better filter system to use. One that won't leak when i change the media in it? I have seen Eheim is a popular one....

Thanks!