Help with leaking Fluval

[roclimber]

wonder if anyone has any experience with fixing a leaking Fluval. I have a Fluval 404 and it's leaking from the side ( side of the handle ). I replaced the O-ring as well as the handles still with no luck.

Does anyone has any experience with this and know the fix? it's been 2 days since i stopped the filtration, i guess if i can't get it fixed by tomrrow, i have no choice but to buy another one.

Thanks in advance for any help.