I would suggest a heater, preferably with an independent thermedic controller. I like to keep my tanks around 78-80. The independent control acts as a redundent system just in case the heater gets stuck in the on possition. A skimmer is a good idea, you may not need it right away but down the road it is very advisable to have one.
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When you think you know everything they give you a Bachelor's,
When you realize that you know nothing they give you a Master's,
When you realize you know nothing but it is ok because they don't ether then you get a Doctoral. | 
