Just got a new box of IO in yesterday, switching over so i can control the parameters of the fresh batches better. Mag was right at 1320, where they said it would be, Alk is just fine, at 9.5 when mixed. My question is they state at 1.026 calc should fall in at 400ppm, mine showed 360ppm. Bag was not clumped, i mixed it up well before opening it. Does this sound about right? I added 80ml per the brs calculator to boost it up to 440ppm, checked calc again and showed right at 440, so testing is consistent.