Steven Taylor I never, ever let tenants do pool care; chemicals not right, damage pool finish etc.... take care of it professionally People share pools all the time in apartment communities, so I don't see a reason why it can't be for both houses.

Told him I would help him fix the issue and educated him that mice, unlike roaches and bed bugs, aren't treated with sprays and other chemicals.

Chemical warfare.Biological warfare, folks will go to an infected tree, beetles, worms, fungus and collect the stuff and plant it on the target.

Best of all, we have a great plumber, Bob.We do not allow chemical drain cleaning products to be used in our plumbing systems and we cover that in our rental agreement.  

Unlike the regular "drying" compound, this stuff chemically reacts and "sets".

The only other competition that does weekly rate Kitchenettes like these around me are about 15 miles away and they are bigger hotel chains that are switching to the weekly rates because of the mass amount of transient traffic in the area due to the boom in the chemical plant business in the area.

And I should go for heat treatment, not chemical, correct? 

Tenant agrees to notify Landlord in a timely manner of drain stoppages that they are unable to clear themselves.DRAIN CLEANING PRODUCTS.Tenant agrees not to use caustic drain cleaning chemicals in any of the drains or plumbing fixtures.Such products may cause damage to the plumbing system and may be hazardous to the environment and to people who may come into contact with such product.Tenant may be able to keep drains clean and clear with regular maintenance by pouring down the drain a quarter cup of baking soda followed by a half cup of vinegar.If there is a minor clog in the p-trap (the curved portion) of the pipe under the sink, Tenant may disconnect the pipe, clear the pipe manually, and reconnect the pipe to clear the clog or may call Landlord for assistance.

The new refrigerant R410 when expose to air containing chemicals found in some typical household cleaners can cause the copper coils to fail prematurely.

He’s ignorant when it come to cash, but very educated and structurally sound when it comes to derivatives, logarithm, history, chemical composition just about anything.