I mean this respectfully, not negative, but have you done any searching in the Nano Tank forum and looked at build threads? Watched any of the hundreds of YouTube videos on any of these topics? The 52 weeks of reefing from BRS? So many questions can be answered in a shorter (and quicker) manner than the back and forth questioning in this thread. It is great you discovered the hobby, IM tanks, and are asking questions. Please consider my response to try and guide how you can learn more in a faster manner. Happy reefing!