I recently purchased a Magnum 250, problem is, it was pushing out so many water bubbles, at one point I couldn't even see anything in the tank! I took it apart, re-lubricated all the parts I could think of, multiple times, still the same problem! I took a look at the inflow/outflow tubes and noticed that there was water leaking from it, I siliconed it, tried it the next day, same thing, tank full of bubbles again! I called the store up, they said air leaks are apparently a "known issue" caused by defects in the cover/tubes and they will send the pieces out to me asap. Has anyone had these issues? I know it's supposed to just push water out with no bubbles. I'm just waiting for my pieces and I'll try it again, anything else with these filters I should know about???