Reef Seam broke spilled 200 Gallons

I have had 2 TWO 150 tall tanks break seams and leak on my floor in a year. Both happened in the middle of the night and I lost everything inside the tank. Was wondering if anyone has had this happen to them and what could I possibly be doing wrong to prevent the 3rd times the charm.
No cracks visible, just the seams appear to be pulling apart due to the weight of the water?