Tenants are smoking weed and strong smell is radiating to my second unit.

[Freddy T.]

I just bought a duplex about 2 weeks ago with tenants in one unit already living there. I realized that the tenants are heavy marijuana smokers and have permeated the smell to my other unit. I am having issues showing the apartment to potential tenants given how awful it smells of marijuana. Any suggestions from landlords who have had a similar problem? I don't know if I should tell the tenants to stop smoking (given that it is legal and technically they can smoke how they want and whatever they want). Should I just kick them out? The smell is really bad and im concerned that potential tenants would not want to move in. I would greatly appreciate any advice or help. Thanks.