Is it a DIY tank? Is it tempered glass? As I said, my tank is going to be two feet longer than this but the same depth, 30 ". I came to believe after everyone's advice, that 1/2" was the bare minimum and thicker would be better. MAYBE if it was made by a professional or established company, they knew what they were doing. I just wouldn't want glass that thin in a tank that tall in my living room. Again, maybe more experienced guys will tell me I am full of it.Aquai;1724124; said:Well it's a tank for sale, 10mm apparently on a 72x30x30. Reckon it'll hold? He's apparently had it 2-3 years with p's in it