What kind of reptiles do you have? I had some Red Eared Sliders in a 40 gallon tank and had about 1/4 of it land and the rest water. I never needed a heater because my heat lamp that I had pointing on the big rock kept water temp at about 85 degrees. I loved those turtles but it ended up costing me alot of money to support them and I felt I couldnt give them the care they deserved so I got rid of them.
