Certain bacteria that live in a cat's feces can also be particularly damaging.

If it has bacteria in it then a chlorine treatment can fix that.

testing for Bacteria and Nitrite.

(2) Chlorine Bleach does kill bacteria and viruses, but has not been proven effective in killing molds on non-porous surfaces.

Just the smallest bit of bacteria will destroy hours of hard work.

Quartz countertops are available in a wide range of colors and patterns, making it easy to find a style that suits your home decor.Benefits of Quartz:Non-porous: Quartz is non-porous, making it highly resistant to stains, bacteria, and mold.Scratch-resistant: Quartz is highly durable and resistant to scratches and chips.Low maintenance: Quartz requires minimal maintenance, and regular cleaning with a mild detergent and warm water is sufficient to keep it looking new.Cost: Quartz has become more expensive than granite, especially if you opt for a higher level quartz.Drawbacks of Quartz:Heat-resistant: Although quartz is heat-resistant, it can be damaged by high temperatures, so it is important to use a trivet or hot pad when placing hot pots and pans on the countertop.Uniformity: Because quartz is an engineered stone, it lacks the unique patterns and color variations found in natural stones like granite, although some quartz look very fascinating.Which is better for a home builder, flipper, or rehabber?

That destroys the bacteria and the septic tank will never digest right again.

Some people have issues with the grout holding bacteria and not being sanitary.

It is a small petri dish which allows the bacteria to grow and based on the sample, you should be able to tell if you have the bad (black) mold. 

. :-)  You could also apply a frosting or privacy film to the bottom half of windows, so that the renter doesnt have to have a textile covering (which harbors mold and bacteria, not good in bath).