zero nitrates on a wet/dry system

[lvpd186]

Since this is a good "problem" I dont feel bad asking about it. I have a 55g. reef tank with a wet/dry sump (I have been slowly removing the bio balls) and the last two times I tested my water I came up with a zero reading for nitrates. Has this happened to other people? I was always under the impression that you can almost never get zero nitrates with a wet/dry because the bio balls are too good at what they do. Any opinions?

 

[Jeff_edge540]

how much bio ball do you still have in? If you still have some in, are you going to keep them in or continue to remove the rest over time?

 

[lvpd186]

I would say the chamber with the bio balls is about half full. I am kind of debating the issue of removing the rest or letting it go for now. If the tank has found some kind of balance I dont want to mess it up.