It happened to my friend jerry we got the 100g cad and after I help him to set it up we found out that it had a leak on the overflow box and we talk to Ed from cad and he didn't wanted to a change !!
Low quality products !
After that I don't deal with them if you want a nice quality tank I will suggest to pay little more and not try to save money on the tank because you will spend more fixing the floor or carpet plus the fish stand .!!