Should we be concerned with moisture and mold because of this?

Maybe there was an increase in moisture causing a roach bloom. 

Inspections from the previous potential buyer came back, and there was moisture in the crawlspace and the floor joist need to be replaced.

They also work well when properly installed to prevent moisture intrusions.

During our home inspection, we found there was moisture in the basement and potentially mold based on our inspector's radar.

There's water that is somehow damaging the hardwood floor by a back sliding glass door, but we can't figure out the source.When I've had other contractors check, we've found no moisture in the walls or even in the ceiling of the basement below -- the moisture is only registering on the floor.There are also no pipes in the area.My only guess is that this might be coming from some kind of roof leak that is just passing the walls and collecting on the ground in the walls.At the end of the day, I need someone who can help figure this out and can help us fix the issue.Got any suggestions?

Fortunately it was a small grow that didn't cause any big issues (moisture damage, electrical modifications, etc) but every surface in the unit had to be painted as well as new carpet and pad.

Then add to the lease a statement something like 'occupants are not allowed to tamper with or disable moisture alarms' in addition to the usual language about notification of leaks.

Make sure the basement doesn't have any moisture issues (ours did, and we didn't find out until after we owned it). 

Find your leak / moisture first and fix.