JUST PURCHASED A SETUP AND CLEANED OUT THE SUMP AND NOTICE THERE WAS A CRACK ON THE BOTTOM OF IT I CAN SEE AND FEEL THE CRACK ON BOTH SIDES OF THE ACRYLIC. I WAS GOING TO BUY A PIECE OF PLEXI GLASS AND GLUE IT TO SEAL THE CRACK. ANY SUGGESTIONS ON WHAT KIND OF GLUE TO USE. THANKS