Would it be alright to put the heater in the overflow in the aquarium? How big of a heater do I need for a 185 gal tank? I have one 250 w heater. Will that be enough? I keep the house at 76. The aquarium has had water in it for a day and is at 72. I just put the 250 w heater in. Oh yea, I do not have anything in the aquarium but salt water so it is not an emergency.

Cecil