Curious why the PO4 is so high unless it needs settling and the readings are off the mark because of that. It just doesn't make sense. I'm making the switch now from seachem to esv. I had been using reef crystals before that even. Back then everything was price. Today I just want the best. Oh and when the bucket says it makes 200 gallons, it sure as heck doesn't. Seachem makes about 120gallons at 1.026. Their measurements must be for a salinity of 1.019 at 200 gallons.