I am setting up a very low budget build (I am student) for a reef tank. Tank size is 20g tall, and I am looking to forgo a wavemaker, for space and money issues. Which canister filter is right for me? I'm leaning towards the Eheim classic series from what the guy at True Percula told me. Also what other equipment can I forego, and other than shopping on craigslist, what are some ways I can save money?