| Because your in a nano situation, your ideally keeping inputs low & maximising outputs, so the bacterial armies chewing the load within the tank should'nt be reproducing like mad in an effort to assimulate excess.
Now compound that with the time it takes to make a bed bio-logicly active & benifical . You did said NOV, giving four months so you should be nearing the maximised mark over the next month or so, adding new media adds to the flavour & that to will be new real estate to cover. all in all it sounds like its doing ok
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