If you run pellets you need to also run a phosphate removing agent like rowa, when np pellets first came out it was said that it is not necessary to run phosphate remover as the bacteria will take care of both elements, but obviously that wasn't the case as most reefer found out when nitrate is depleted, the left over phosphate will slowly creep back up again.
As of now, I am running 2 nextreef reactor for pellets and rowa. I test phos quite frequently and as soon as I get a reading of 0.02(hanna checket) I change out the rowa.Pellets are top up every 3-4 month. Carbon is ran passively as I found this method fairly effective. If you need more info, Jeff @ JL aquatics has more info on this subject. I believe he has contacted a few bio pellet companies to find out the details about them.
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