That's wierd. I have never had a problem with my fluval 405. Honestly, I would recomend another fluval... but apparently you haven't had as good of luck with them. From what I've heard, (I was researching the fluval and the marineland cans when I set up my tank) the marineland filters are 'self priming', but sometimes it doesn't work, and then you have to pour water down the hose and it is a big pain in the..... oh, and if you have an acrylic tank, odds are that the boiwheels in the return won't fit. If you don't want another fluval, I would go with a rena or ehiem. I've never heard anything bad about either, except that if you neglet maintenance, a seal might eventually leak(like with anything) or if you let the water get too low, it might shoot it out of the tank(like any canister).