Can you please give me your opinion on this used 220 gallon tank. It is about a year old and is a Perfecto tank. It has four 1 inch holes drilled on the back glass. One on each top corners for the overflow and two in the middle for the returns. I'm a little concern about the silicone. So what do you think? Dim: 72x24x30.
![IMG_3060.jpg](http://i17.photobucket.com/albums/b98/ricwilli/IMG_3060.jpg)
![IMG_3062.jpg](http://i17.photobucket.com/albums/b98/ricwilli/IMG_3062.jpg)