Lol, I was only concerned because a similar thing happened when Ebo-Jager sold their heater line to Eheim. They started making submersable heaters with a water line mark, and instructed to not submerse them. It ends up they only had to state that due to some sort of legalities, and they were totally submersable.
The bigger problem was when the company changes hands there were some manufacturing glitches. This often happens with any company changing hands, they had a couple of runs of bad heaters nearly 2 years ago. A buddy of mine bought 8 heaters, 6 died in the span of a couple of months. Jager replaced them without a problem, the newer ones work just fine. I was hoping AquaClear didn't go through some sort of sale/reorganization, as I have a few powerheads still in the box.