I know this might sound pretty odd, but I am wondering what size heater to buy for my 150g? It has been set up for several months now all of which have been summer months. Here in texas all of my tanks stay at around 77 with no heater during the summer months. Right before summer hit two of my heaters on my smaller tanks crapped out on me so I just didnt run any heaters this summer in anything. I know not the best idea but it worked out. Well now I am working on buying a new set of heaters for everything and since I have never bought one for a large tank I am wondering what size to get for the 150g? I have heard that two smaller work better then one large one. I hope I didnt loose you in my rambling.