1.   Clean rocks, plastic plants, etc in a bucket of warm water with a cupful of household bleach.

2.   An immediate solution is to treat the area with a solution of one part household bleach and three parts water.

3.   Another man said not to use household bleach, but rather Era, which is a detergent with oxygen bleach.

4.   A more popular solution is hypochlorite, or household bleach. . . .

5.   Clean the reservoirs with household bleach and water once a month or when algae begins to form.

6.   Common household bleach.

7.   First, clean and sterilize everything with a very dilute solution of water and household bleach.

8.   If it is mildew, wash the deck with a solution of one part household bleach and three parts water.

9.   If it is mold, apply a mix of one part household bleach and three parts water to the dark streaks.

10.   If the stain remains, bleach the top with household bleach, twice, let dry, rinse, then sand down the grain raised by the water.