Is This Heater Overkill?

sylviepld

I have a 75 gallon tank with a hydor 450 canister filter. I have two heaters that a friend gave me. They are 300W and 200W. I was going to put one at each end of the aquarium. Is this to much and which one should I place at what end. For example would it be better to have the 200W or 300W near the outflow? Lastly, if this is too much for the size tank what wattage should each heater be if I want to use two? Thanks.
 

max h

Not really overkill, space them evenly across the back of the tank with current flowing across them. The 300 watt won't have to work as hard as the 200 watt to raise the temperature a degree. Try to set the thermostats on the heaters to come on at about the same temperature.
 

sylviepld

Not really overkill, space them evenly across the back of the tank with current flowing across them. The 300 watt won't have to work as hard as the 200 watt to raise the temperature a degree. Try to set the thermostats on the heaters to come on at about the same temperature.
Thanks. Which one should I put closest to the outflow or does it matter?
 

max h

I'd put the 300 watt closest to the output.
 

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