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I have searched this before and the general consensus is no don’t do it. At most 24hrs before use. Also many people who use bio Bizz don’t ph unless out the tap is over 7.5.
I have used bio Bizz for a while and never ph with great results. In fact a friend won the IC420 cannabis cup with bio Bizz and no ph adjustment.
You need to check the ec level before you feed. Soiless for heavy veg would be 1.6 to 1.8ec for dirt 1.8 to 2.0 ec. Ph for soiless 5.8 for veg 6.3 to 6.5 for dirt. Cheers