i was wondering if it would be better to use one large heater in a 75 gallon tank or two smaller ones. A friend of mine suggested two smaller one would be better... does it really make a difference.... what do you guys have??
Two smaller heaters are better.
If one of two small heaters malfunctions you won't cook your fish.
One large heater malfunctioning has the ability to cook your fish.
You have the added back up of still having one heater left if one takes a dump on you too.
I have always put my heater close to the filter, figuring that warm water would be sucked into the heater and then distributed throughout the tank....just my opinion. I have one heater in my 75 gallon.