Below is the language in my lease agreement with them:"(Checked) NO SMOKING: No smoking of any substance is allowed on the Premises or common areas.

Automatic Rejection: Your application will be automatically rejected for any of the following:a) Eviction by a prior landlord in the last 24 months;b) Outstanding debt or unpaid damages to a previous landlord;c) Undisclosed criminal record, felony or misdemeanor;d) Being registered as a sex offender;e) Conviction of possession or distribution of a controlled substance;f) Conviction of spousal abuse or violent crime;g) Currently pending the outcome of a felony or misdemeanor charge;h) Bankruptcy in the past 5 years that has not been discharged/released;i) Invalid social security number;j) Outstanding federal tax lien, the repayment terms for which are not current;k) False information on your application;l) Incomplete application, including applicant signature on all pages of the application and this form;m) Failure to pay the application fee at the time of application submittal.

I used this gel substance that is suppose to be better than peanut butter, but now I’m thinking I should have set a couple with the real thing.

One is an exclusion for Business Use of the property and also a specific exclusion for controlled substances.

I do not ask tenants if they are smokers, I will rent to smokers, but it is very clear in my rental agreements and house rules that there is no smoking (of any substance) on the property (that includes garages, open space, parking areas) by tenants, their relatives, and their guests.  

I had some of my buddies go to rehab and such for substance.

quality of well water is extremely important. need to sample not only for potable criteria but the full range of regulated substances. naturally-occuring metals such as arsenic can be very expensive to treat. 

@Katrina Cebrian This may not be the case with your applicants but many charges may never become convictions when the victim chooses not to proceed, which happens frequently during quarrels when one partner holds a significant amount of power over the other or illegal substances are involved and they're both not in their right mind.As you've stated though, their income is nowhere near the minimum requirement making any past charges moot in this instance. 

“I haven't done any substances in over 10 years.

Do you mean for substance abuse treatment?