Today I was messing around in the sump and felt a slight zap. So I’m like what the heck, so on a hunch I pull one of the heaters out and sure enough, it’s leaking. I pull the second one, also leaking. I pull the third one and guess what? Yep, you guessed it, it’s a hat trick, folks. These are the Eheim Jager 300w heaters, 6 months old! Unbelievable.