Hello linnymarie. You are following the Starting Procedure, which is the first step in the HRP (Health Recovery Plan) as outlined in Jim Humble's 2017 book
MMS Health Recovery Guidebook.
Yes, you can use 2 fl oz of the 4 fl oz for day one's 1/4 drop hourly dose and split that in half for you and your husband, 1/4 drop each. Now you only have to throw away 2 fl oz instead of 3 fl oz.
There is
another version
of the Starting Procedure I wrote for those using CDS, CDH or MMS1 Tablets.