What were your biggest purchase mistakes?

[es355lucille]

Geismann Infinity Light - So any of you that think that buying high end is the total way to go!! I got a dud.......first all the balasts burned out.....external and internal. Just recently there was a short in the socket connection and took out a plug on the aqua controller Jr. Then my wrasse jumped the other day and broke the lens on one of the HQI......maybe the fish don't like it!! LOL! (fish is ok)

This thing is just cursed!