Tank looks good! Quick question, have you ever used a commercial type silicone to glue overflow/fix leak ect??? I heard a story of someone that built a tank using a commercial type clear silicone from home-depot. These silicones contain arsenic to inhibit mold growth if used in showers/sinks. Fish never survived in the tank and the theory was the arsenic from the silicone bled in to the water. Who knows for sure??