Well i see that almost everyone on this forum really dislikes Bio Balls and from what i can see becuase of Nitrate build up. The thing is i have a 29Bio Cube and i still have the stock setup with the Bio Balls in the second Chamber. ( My first tank and was new to the hobby so i didn't even know about fuges's or skimmers ) I was thinking about slowly removing the Bio Balls and making a ruge in the second chamber and adding a skimmer, but then i thought why fix something if it aint broken. My tank has been set up for about 6 1/2 months and all my tests have zero amonia, nitrite, and nitrate, my water is clear, and all my life stock is happy and growing. So my question is, are bio balls really all that bad seeing as that my tank is doing so good, or will eventually over time this start to go downhill and a fuge and or skimmer necessary for my tank?