What's the dumbest thing you've done?

[jordsy]

just 3 weeks ago i came up with a design for a trap to catch those bristle worms. I used caulking to seal the holes in my trap but it was type of caulking to seal seams in the walls of houses for looks. It wasnt water proof and it leaked through out my 90 gal tank. I had to change all the water.... not fun

[adidas]

the dumbest thing i've ever done happened when i was new to the hobby...

my first tank move, I had to store my fish in a rubbermaid container overnight... I just left them in with a heater and the lid on....No airstones, powerheads... my Unicorn tang died Stupid!!!!