Even the dangerous molds are manageable unless you already have respiratory problems.Ensure the ventilation fan sucks air out and vents into the outdoors, not the attic space.Train the tenants how to kill/clean the mold with a simple bleach solution and spray bottle.

Mine was on a slab, so this might have helped (I just cleaned the slab with a mild bleach and water solution). 

Also bleached the less than 1sqft of surface mold and painted over it).

Pour bleach on it?

Washed the tile floors when bleach and several other chemichals.

Most of the time just a little bleach can take care of it.

Make sure you don't have a dead mouse in the unit somewhere....could take it outside and power wash it and bleach it....could try a couple bags of charcoal....use the coal for a barbeque if it doesnt work.

the landlord would not fix the bathtub as you can see its not usable. the apartment over me had a flood and leaked water into the bathroom ruining the paint. also look at the mold builds up the new owner told me to use bleach and fix it. the carpet was old and dirty when i moved in was dirty if i walk on it bare footed my feet look like i have bee walking on black coals. they turned off the gas and water for 2 days we dang near froze to death. new owners now and they have been here for 2 months and they wont fix it either but they refurbished 3 other unitshttp://img259.imageshack.us/img259/920/1032414.th.jpghttp://img811.imageshack.us/img811/5759/1032415.th.jpghttp://img502.imageshack.us/img502/2409/1032417.th.jpg

Thereis little chance a tenant will change it on their own orbuy the filters unless they have some breathing condition.About the drain line, down here in South Florida we have to shop vac the line or pour diluted bleach down it to prevent any algae growth in the pvc line.

I suppose I was lucky though--I told the contractors to bleach the heck out of the subfloor and it worked wonderfully.