Okay I am HATING filters right now. I had my rena xp3 on a 75g and to prime it, I'd just push down the little lever on the top of the canister, it would fill itself up, then I'd plug it in and voila. Now I've moved it to my 90g and it's not priming at all. I've completely emptied the canister and poured water down the tube. I guess this worked because it's running now but it's also very very loud. Air maybe? But I give it a shake and it doesn't go away. I can't fill the tube up manually every single time just due to my setup... very difficult to get to the hose. Not only that but my filter would cease to work if the power went out. If I unplug the filter and plug it back in, it won't run. So how do I fix this back to normal? EDIT: Now it's quieter.... and the outtake seems to be more forceful... guess it pushed all the air out?