I've never used bio-balls, but i have done a lot of reading, here on this forum and plenty of other sources as well. That and an uderstanding of the the denitrification process is what leans me toward advising aquarists against bioballs.
, you answer is right here why you have no nitrate problems with the bio-balls:
Originally Posted by cccapt
I have a sponge over my overflow with prevents crap from getting to my sump and I do biweekly water changes.
Bi-weekly water changes is pretty frequent, IMO
. That alone can keep nitrates to 0. But IMO
that is also a lot more maintenance than I want to perform on my tank. I'll also point out that I see LR
rubble in the bottom of your sump. Does your main tank also have LR
? What about the substrate in your main tank? The LR
rubble, and any LR
in your display tank are providing areas of low oxygen for denitrifying bacteria to process the nitrates. But if you have a reasonable amount of LR
and a proper susbstrate then there is also no real "need" for the bio-balls, and thus why I often reccomend that new set ups not use bio-balls. Why add another component that isn't necessary if the rest of the system will take care of things.
This will be a good discussion, thanks for starting it