In this thread post your most idiotic reefing mistake

[FishyFishy!]

I've been lucky enough to not have anything crazy. BUT

I have overflowed numerous buckets by not having an auto shut off with float valve on RO units. Also spilt many many gallons of water not securing syphon hoses to the tank properly.

The worst was building my 187. First, I spilt an entire large can of PVC glue onto my new carpet. That sucked. Goodbye carpet. Then when I turned on the dart return pump for the first time, I had two (not one.. two haha) of the loc-line return lines pointed up over the rim of the tank. Not only did I get a mouth full of water as soon as I stood up, but there was a tonne of water on the floor, AND in a race to point them back down I knocked the 72" 12 bulb constellation fixture into the water. Luckily I had a GFCI plug in, it snapped before anything was harmed. I let the light dry out for a few days and it worked great after!