That's exactly what my 225 has all around, 1/2 tempered. Added back several gallons in volume versus 3/4 regular glass without having to bump up the size. Either mine's too fat, that one's too skinny, or somebody is trying to be slick...I see a lot of kooky tank sizes on Craigslist at times, like 68 gallon (really?) 52 gallon, 44 gallon tall and stuff. I usually ask sellers if they would post a pic with an object like a soda can or basketball. Or lean a yardstick against the walls. Eliminates guessing and 'creative' tank sizing. Reminds me of real estate pics that make a 8 x 11 bedroom look 12 x 20.