In my house I have many fish tanks . Sadly fish tanks take energy to run and energy costs money (obviously). So whats more cost and energy efficient, a single 125 gallon, or one 55g, one 50g, one 40g, and one 35g? I'm either gonna shut down all except the future 125, or shut down all but the 55, 40 and 50. Which combo or solo tank will be the least to run? The only reason I ask this is because I am 15... and Dad gets kinda angry when I want another fish, or fish tank. Some of the tanks are not mine, lol im not that into fish . BTW, I'm not sure if this is in the correct location for this post, so if it's not, could a mod please move it.