Decided this needed to be posted here. There has been a major voluntary recall of Marineland Stealth and Stealth Pro fish tank heaters. I would recommend that anyone who has this type of heater check out THIS LINK
to see if their heater(s) are affected by the recall. There is a contact number at the bottom of the page if you would like further information on how to get a replacement/refund. The recall covers a very wide range of dates (2004-2011), so don't think if you have an older heater that you're not affected.
I realize this recall has been out for a while, but they just reposted it at the store I work at, so I thought it was worth reposting here.