Biobizz goes off real quick when you've made it up, even with an airstone. I really doubt it would be a good idea, I would have thought some cheap chem fertilizer would be a better bet nothing organic.
That was my thinking too - I have seen biobizz turn over night.
Screw the chems - they will be put back on PBP veg 'til Friday.
Going into week 4 they could use a bit of N anyways.