Question on spraying clones with Thrive Alive-B1

I have clones that are in the process of rooting in my bubbler system. I have had them in there for 9 days and they are slowly starting to make roots. I was wanting to spray them with Thrive-alive B-1. Do you all ever use this?? ON the website it says to use 4 tsps per gallon for rooting clones and spray the clones just once. I figured I would do this and it could not hurt them. Should I use what they say or should I go with half strength since they are just clones still?
 
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