Not an accident but a near miss, i have a Wilma system, 70 litre res, and i use reverse osmosis, so a trickle of water. Filling my tank takes a fair hours. So i have it chugging away filling my tank and i go off to do other stuff. Well, you have a smoke, watch some movies, have a little nap.......HOLY SHIT THE RES TANK!
I run to the grow room, flick the tap off and check the tank. You know when water has that skin on it, bulging on the rim of a glass? That on a 70 ltr tank. Dipping the tip of the pump i use to drain my tank was like defusing a bomb. If i would have not woken with a start, the water damage would have been extensive...