Wet/drys, like bio-wheels and other mechanisms have no real benefit because the amount of ammo/nitrite reducing bacteria is based on your bio-load, not a contraption mounted outside your tank. If you have substrate in your tank, and some LR and current flow, then you have more than sufficient places for your biological filter to grow. We also have the weird logic of *why in the world* you'd want to move the most critical part of tank ecology *outside* the tank where it depends on AC power to survive. That to me, has never made sense.
Wet/drys and bio-wheels also don't produce any more nitrate than a pure berlin style tank. Again, garbage in = garbage out. The difference though is wet/dry's and bio-wheels have ziltch chance of reducing nitrate to nirtrogen while big pieces of LR and deep substrate beds will reduce *some* pesky nitrate.
I also have had good luck with Remora / Aqua C skimmers. However, I woulnd't use them on a really big tank because they tend not to move much water, and the more expensive needle wheel skimmers are more efficient.
Very nice.
