that's odd. The only difference for me is that I only dose once a week (12ml for 120g). Nitrates are around 2-4 and PO4 is .07 as of MondayI dose 18ml since I have a 180 twice a week. No other changes and I keep my nutrients higher. P04 around .08
But the 2 doses a week shouldn't matter since it happened after the first dose