06-24-2008, 02:40 AM
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Originally Posted by iamntbatman
You can use either, but if you have a wide enough PVC pipe returning the water from the sump to the aquarium, you can put a heater inside the pipe.
By "as close to the output of the filtration system" I meant inside the display aquarium but physically as close as you can put the heater to where water is returning from whatever filtration system you're using. If your only filtration is the sump, then this would mean inside the display tank as close to the sump return line as you can put the filter.
I think putting the heater inside the return pipe would be the better of the two options.
A couple of things here. How do you run power to the heater? And the heater may "burn" the pvc and release poison into the water. Polyvinyl chloride is some mean stuff and it doesn't have to burn with a flame to be released.
If you want to use inline heaters, it is better to use ones manufactured.
I use two 400w titanium submersible heaters in my 125g. Pricey but there are none better.