I was curious to know the outcome of people's DIY BGs after a few years in their tank? I had one in my 20 and 55, but after a couple years, the styrofoam deteriorated enough to lose grip of the silicone, sending the BGs floating to the top. The silicone is still secured tightly to the back of my tanks, it was the corrosion of the styro around where the silicone bonded to it that I had problems. I was curious if other people's BGs have held up better over time. Not a few weeks or months, but years. I wanted to try and figure out what I did wrong with mine, or what I could do differently to make them last longer.