Hi, after finishing my wet/dry filter and coil denitrator I'm looking for a new DIY project, and I think a wavebox would be a good idea. I'm planning on buying a wavemaker and puting it ion a custom acrylic box. My tank is 220g and 6 feet long, so I'm down to 2 choices, the Tunze 6100 for $200.00, or the Resun 15000 for $100.00. Please me know which one would be a better candidate for this and why. Thanks