Tank failure with MP40

So I am guessing the flexible Tub got flexed from the pulsating setting? That seems logical.

I wonder if you flexed the tub by hand over and over if it would do the same thing. would think a movement in water like a wave would be risky considering the transferred weight action repetition. i have two mp40's and do not use the wave setting. my tank configuration would probably clam the transferred energy better than a standard tank.

Good point though. Consideration should be used on Murphy' law. Glad you caught it in time. Welcome to reef central.
 
I follow the moto that I'd rather bend than break, but in this context, the 24" tall wall probably bent too much. I obviously could not see the side wall move, but the repetitive and significant force over time probably contributed to the result seen here.

Think of it this way--several pounds of force x 172,800 pulses/day.
 
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