I've been wondering if Bio-Wheels are really worth it for biological filtration? Are they the best? I currently have an aquaclear 50 with the standard bio media, a sponge and some lava rock would a bio wheel be a lot better? It only cost me like $15 so its not a big deal. I'm just wondering if maybe getting an emperor filter with the bio wheel would really help. Thanks in advanced. Also are they quiet, not including water pouring out. 