Drill close to the base of the Tee. Cut about 4' of silicone airline tubing. Run your silicone airline tubing through your Tee and into your pipe then out the hole you drilled. It helps to cut a point into the end of your silicone airline to thread through the small holes.
Attach your air stone and do the same thing to the other side. This will hold your air stones in place without adding any metal parts. Feed the airline through the bucket.