Hey guys. I am wondering whats the best way to attack this in terms of using less electricity? Would I be better off going with one more powerful heater or two less powerful heaters? (I have one rated for 90g) Thanks for your help
200w from 2 different heaters or 1 400w heater is the same. They will also heat about the same. I do think that 2 200w heaters may heat the water a little faster but I have no proof. Since you can space them apart.