Well, this is definitely interesting. Must be some kind if imbalance, but not sure exactly what.
I actually only dose about 2 or 3 times per week (20ml total per week) for a 230g system (I don't incl my sump, as figure I subtract that much for the live rock). Been doing that for 2+ years now, and everything has been good.
Have not opened by bio pellet reactor (to add pellets or clean) now for over a year. Seems that my bio pellet consumption has all but stopped, but my nitrates remain at zero.
And remember, when I started all this (3.5 years ago), my tank (which I inherited when we bought the house) was a total mess with nitrates up to 100 ppm, cyano, algae, detritus, you name it...
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