If I remember well the mixing order matters with GHE Flora Series. So you always starts with the Micro ( mix it ) then add tha Grow ( mix it ) and finish with the Bloom ( mix it ) , the extra cal mag or PK are the last elements to be mixed. The reason why you have to fo it in that order is to avoid salt precipitation in your mix. I've tried it all the possible ways and schedule but it always appears that half strength is not enough so after the 2 first watering ( half and 2/3 strength) I use the full dosage. You can even go deeper by using the Lucas Formula which is a GHE aggressive schedule using 16ml of Bloom and 8 of Micro for each gallon of water and my EC was always 1.8 in flowering ( from the 1st day of flowering to the last )