no not by the bulk head right on the corner of tank.a chip broke off the corner.that is why i think i can fix it.its in the overflow box so not much pressure is in that area and it only holds a gallon of water in the overflow box.the over flow box is permantly attached to side and back of tank so it creates sort of like a bracing effect.i think if i use the apoxy method that jhale sent me ill be fine . i think he has helped me find a goo method of fixing it.
it's held together by the bracing unless its and acrylic tank