If adding Silica last, pre-dilute the dose at least 10-fold with water to minimize the amount of white particles that form when it is added to the nutrient solution.  This problem is more pronounced at higher EC’s especially with hard waters.  Note, these ‘white particles’ will normally dissolve if the nutrient is immediately stirred and pH is checked, and is therefore typically only a ‘temporary’ aesthetic problem if treated correctly (see Fig 13.1).

FloraMax Silica can be added first however the pH should be lowered below 7 prior to adding the nutrients and additives. Note, Silica increases the water’s pH which can destabilize pH sensitive elements once they are added. By adding Silica last, we generally only need to worry about pH right at the end.  If you add it first, you need to worry about pH the whole way through.