Well to be 175 gallons it would need to be close to 72 x 24 x 24". The tank looks 72" long but does not appear to be 24" high. What throws me is the depth(front to back) looks greater then 18". It is hard to guage with the to pics and the towels covering some of the tank. My guess would be that it's an obbball sized tank with the dimensions of 72 x 21 x 20" which is only about 130 gallons.