I just walked over to my tank and the water was just over the center brace and was about 15 seconds away from overflowing. I'll tell you what...I can't wait until I get my new tank set up. CPR overflows are a joke! I can't believe that not only do they suck without an Aqualifter, but they suck with one too. My Aqualifter (2nd one in 3 months) loses momentum after a few weeks. I always have to just pop the hose off the CPR and then stick it back on for it to start sucking again. Believe it or not, this is probably the 10th time I've caught it from overflowing, and luckily it hasn't gone over the edge yet. For anybody who is looking at overflows and can't drill their tanks, U-Tube style is the way to go. I had one on for months and it never lost syphon.