So I didnt understand the guy at the store who was helping me w/ plumbing on my new 60gal. I was drilling a hole in the return pipe to prevent a back syphin......needless to say I then had a mini guizer coming from the top of my tank..........MY STUPID MOVE. So I now know where to drill to prevent this issue...........question is will silicone be eough to plug the holes I drilled prior??? I plan on letting it settle for 48 hrs. Any ideas on how I could make the seal even better? I just dont want to have to re do all my plumbing on the return..........PLEASE HELP!