I just pulled a 250w old-style Stealth out of a 40 breeder last week, second one of those that's gone bad and tried to cook my fish in a month. The first one was in a 33L, it did kill 5 little brevis fry but none of the BN or endler's. I have 5 more of those still in use, and 3 of the Pro's high and dry. I only used 2 of the Pro's for a short time before I heard about the exploding issue, the 3rd is still new in the box. I have 13 tanks running, and need to replace 10 heaters. Looks like I'll be shipping a medium flat-rate box full of heaters back to Marineland...