OK, back from the store and errands... need info to mix up this brew..... so how many ml/gal of CalMag should add to the nutes in your opinion? I have the following from the new nutes I put in a day and a half ago:

3 gallons RO water + 1 gallon tap water (96 PPM)
Pure Blend Pro - Bloom, 60ml (630 PPM)
Liquid Karma 20ml (100 PPM)
Sweet 10ml (50 PPM)
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Total PPM = 885
PH = 5.8

I checked them a minute ago - the PPM was 920 and PH was between 5.7 - 5.8