Listen to jcardona. Definanlty do a sump, herbie or beananimal depend on how or if the tank is drilled. Another thing everyone is a fan of on here is overfiltration (as said earlier, a bunch of fx5's). Anything 4+ times per hr turnover rate with decent in tank flow. As far as w/d or sump? I have the exact same footprint tank, just shorter (mine is 300g not 400g) and I use a sump with filter socks and just diy pvc plumbing using the herbie method with about a 4x turnover rate w extra in tank flow and my water is crystal clear. I only use submerged media with one bubble trap, but more or less I built it to keep the ceramic out of my pump. Not too big on plants and I'm sure being a sw guy, you know your lights, and I also can't help much on the native part either. Hope if you have more questions you'll be back. There are a few ppl with knowledge beyond owning a standard 125g with 2 fx5's.