02-07-2012, 12:17 PM
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Originally Posted by Byron
That appears to be a fully submersible heater, so it would be best close to the substrate, same horizontal position. This way, the heated water will rise (warm rises, cool falls in water as in air). Close to the top the heat will more likely partly dissipate out of the water. The heater will also be more hidden down behind the plants.
I was thinking about that too, but the water that comes out of the filter is cooler than the rest of tank, the filter also has enough umph to push the water around the entire tank so it has enough flow everywhere. I'll try to re-arrange it so it's out of the way, but I'm afraid that the plants will cook =)