Quote:
Originally Posted by daplatapus
Uhmmm, I think that is just a packing spacer for the end of the heater when it's in the box. Pretty sure it's not meant to stay on the heater when in use.
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It is a packing spacer, but it also works great inside the tank. I kept mine on so when I work in my sump and my heaters get moved around, they are not smacking glass on glass. No problems with it being on at all.