That could very well be true. However, reading how the directions are listed on the bottle, it seems to be x drops per day per 50/60 gallons of water. The next section or paragraph states 8ml (1/4 fl oz) each day thereafter. Hmm. So really it should be 1 1/4 fl oz each day. Glad I ordered two bottles. I may even need Alex's bottles as well!
A bottle holds 8 fl oz (240 ml) so it is only 6 days worth at that dosage. Wow.