I want to get a wavemaker when I start getting corals. I am getting soft corals because i have PC lights Coralife 260 w/lunar to be exact. Anyways what is a good wavemaker? How do they work? What should I be looking for in terms of brand and type? I have seen ones that are like surge protectors that alternate flow I guess? Then there are ones that hang in the tank. I have a 72 gallon tank. Suggestions? Thanks!