Mold Issue in my rental property

[Austin Sharp]

Hello:

I have been a bigger pockets member for 8 months, and have listened to the podcasts for about a year plus. 

I have 16 properties in the Amarillo, TX area currently.

My question is about mold. One of my houses had a leak underneath the house. We fixed the leak, but we discovered some black mold.
My tenant used to sale to Blackmon Mooring, and he works for a local flooring company. He told me he would place a few fans under the house, and spray with bleach etc 
He has experience with this type of issue.

Question: would you recommend this course of action, or should i call a blackmon mooring/ servepro company? I don't want the problem to spread and i don't want anyone to get sick.I want to make sure the mold is killed and doesn't spread.

Thanks!!