So for the past week my eheim 2262 started shooting tiny bubbles which was a sign of air getting sucked inside the filter. after putting it apart and back together I noticed the 90 degree connection from the Pump to the canister has a small O ring , that's where the air is coming in. I took it out, put it back on. Still doing the same darn thing. Thinking of just sealing it with silicone. What you guys think ?