BRS video on salt crud question

[jjg77]

Brian mentions in his “skip the crud” video that “in the end the cost per month of the highest preforming salts comes out to about $5 a month with a weekly 10% water change on a 100 gallon tank. I don’t understand where he gets this number. Currently - on sale - neomarine costs $84 for 150 gallon. That would be a cost of $33.60 per month??

 

[KStatefan]

Difference between the "better" vs the "cheaper"