Hello Anyone know a good way to restart the fluval after you do filter cleaning and the canister is empty? i tried letting it fill from the siphon hose then its states bubbling all out the siphon anyhow long story short i have a hard time repriming the little handpump is usless the way i see it the water column while pumping never gets over the hump to start back down. I always have to remove the siphon tube and fill it with water then reinsert into tank then restart pump Pain in the A$$ . also when you clean the filetr foam should i clean it all or just 3 out of 4? or is there enough bacteria left in the bio max tubes that I will not disturb?