Here’s a neat idea from our friends at Reef and Rainforest Design. You know that line on your heater that says ‘water line’? The one most people look at with curiosity, shrug, and drop the whole thing to the bottom of their sump anyway. And why wouldn’t you? The box does say ‘submersible’.
Well, since the line is there, it *MUST* mean something. I mean, manufacturers don’t just put warning labels on things for no reason, right?
Well, the warning IS there for a reason. Over time, salt water eats away at the rubber housing leading to cracks and often to a shocking end. The (blindingly obvious) solution is to keep the water below the water line. Wow! And they said blogs were good for nothing. Look at that useful information!
No. The neat trick here is HOW to keep the water below the line. Everyone knows the suction cups that come with heaters couldn’t suction their way out of a paper bag. The real solution is styrofoam.
I had an extra piece kicking around the house and I drilled three holes.
Then I jammed the heaters through the holes.
Voila! Float it in your sump and no more shocking endings!

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nice tip thanks!
This is the stuff that we wanna see
Keep up with the good info.
Man, I use styrofoam for everything (holding together my dosing system, holding my lights up when feeding, blocking light in my sump), but never thought of that, awesome idea.