Just use silicone??
Its probably been said before, but, I'm adding an overflow to my 80g..was going to use 1/4" plexi in the back corner. Can I just silicone it in place or do I need to find a different sealant to go from the glass to the plexi. My thought was that there wouldn't be too much difference in water pressure on either side so I should be safe. Comments or concerns anyone??