Advice about sumps

[Delphinus]

Originally Posted by StirCrazy

Bio balls only create an aerobic area, so they will do there jobe and turn amonit into nitrite then nitrate, but if that is all you have ie, no live rock, then it is going to be at a reduced capacity to turn that nitrate into nitrogen gas, which will make the nitrates go up.

The thing is, even if you do have live rock, the LR itself will be a reduced capacity to reduce NO3 because the bioballs are competing againt the LR. Sorry if my explanation was a little too simple but I've been trying to be less wordy as I have been accused in the past of having long posts.