Hi Steven, The point is, you should not need to be using Epsom salts in compost with a good fertilizer. Plant Magic OT grow and bloom are both molasses based, If you look at typical values for molasses you will see that it contains a fair amount of Magnesium & Calcium, plenty to keep cannabis happy through its complete cycle
I dont know if Biobizz contains molasses or not, but if it does it not at the correct ratios. You would be better off giving your plants a supplement of molasses rather than keep chucking Epsom salts at them.
Regards BL
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