With almost 20 lbs of LR in a 14 gal tank, I would think that this process should be optimal.

Anyhow, with a couple more water changes, I hope the nitrates are gone.

It all depends on the type of liverock. If it is dense non porous liverock, it will never do the job right. I only have about 45 lbs of Totoka liverock in my 75 gallons but since it is so porous, that's all it takes.

YOur liverock must be very porous for it to be efficient as denitrification.

Wow did not know that, thank you :lol:

It's about quality, not quantity as Daniella said. If you are doing a good job vacuuming the tank (including rocks) while you are doing your water changes it should really help. Simply taking water out and putting clean water in won't do the trick.

You're welcome. :)

my nitrates were pretty high too like in the 80 range. did a huge water change waited few days did another one and now nitrates are sitting at 0! :biggrin: