Tank heater question

davyr

AC Members
Nov 19, 2008
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I have a Juwel aquarium with an enclosed heater and pump (back right hand side) and i noticed that the heater was struggling to keep the temp,so i bought a new Visitherm heater. Could you tell me guys if it is better to put it back in the enclosure or shall i place it somewhere inside the tank out of the enclosure.
 
I have always preferred to keep heaters out in the open where the filter suction draws across them......
 
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