Yeah, what is the luck, i just don't understand. The tank is only 8 months old, i am on leave in NY, and my buddy calls me and says that there is only 5in left in my 210g tank.... W>>T>>F>> i called a couple guys and rangled up a 55g to hold them, until i can get back to investigate. It doesn't make any sense??? There must me a leak or crack in the bottom of the tank,,, only 8 months old... no rock slides, and 3in of sand...