Every time I flooded the house, it wasn't my fault
One filter(sand bed filter) developed a hole at the bottom plastic and leaked half the tank while I was sitting on my a$$ in the other room suspecting nothing.
I ran dry one of my externals for 2-3 weeks as I forgot to turn on hose adaptor switch. It started up again like a champ and it's been working for 2 years since.
Then another time the spray bar of one of the externals detached itself somehow, the water flow twisted upwards as it was hitting against the heater and the inlet somehow, went through the back hole of the cover, slowly draining out the tank. I was sitting next to the tank and only noticed when my filters started making noise as they have a gap on the intake and lose suction when the water level goes down(smart Chinese
And fish swimming around happily enjoying themselves the extra oxygen...
And my trickle filters flooded out the back a few times, one time(ok, my fault) I had turned the spraybar holes against the wall after a clean....
Last time it was the planted in the filter peace lily growing too big roots and blocking the flow eventually, water found its way over the back of the tank and then decided to take turn into the cabinet, near my plugs, good job they are hung on the side so it didn't drown them but enough to cause a spike so the electricity shut off, hence I found out.... It felt sort of silent all of a sudden
I so much miss the times of the undergravel, internl and sponge filters...
And that's not to mention a 2nd hand tank I bought leaking too....
Lucky you that never had a leak