depend on how thick are the glasses and the dimension of the tank, some people got their tank with very thick glasses. a 50G tank(40L*16W*18H) with 5mm thick (nearly 1/5 in) could weight about 50 lbs. a 125G could be more than 200 lbs with minimum thickness glasses to keep it safe! can you give me the dimension of the tank and thickness of the glasses ?gcnd06;5028111; said:about 200lbs
if the tank is 206 lbs and he will fill in 125 G water, it would be about 1250 lb when filled !Yellow_Perch;5028255; said:206lbs unfilled, 1,400lbs filled