The Planet Radius 175 Gallon Tank Kit in Classic Mahogany The all new Planet Radius 175 gallon tank has a 72.5" back, the sides are 18.5" with a center width of 24.5" and a radius of 102". The tank is 29.5" tall. The tank is reef ready with two 1" drains and two ¾" returns. The Radius stand is 34" to the deck with an 8" canopy and is made of beautiful Cherry wood.