Special cleaners for the Loo: Feed your septic tank with bacteria cleaner at least once every 6 weeks. Formula– 4 cups hot water, 4 cups brown sugar, 2 packets dry yeast. Pour the hot water into a bucket, add sugar, stir until dissolved. Add the yeast and stir again. Leave for about 15 min or until the yeast and the sugar begin to froth. Pour into the toilet about a ¼ of the bucket at a time flushing each time you pour more in. This will create the beneficial bacteria you need in a toilet.
Getting rid of black gunk in drain: 1. Put pot of water to boil. 2. Pour baking soda down drain. Baking soda has ability to neutralize fatty acids, will eat away the grime while you're waiting for water to boil. 3. Pour boiling hot water down drain. 4. Let the water & baking soda work for 10 minutes. 5. Then pour 1 cup bleach down drain to kill any remaining mildew/bacteria.
The Only Spot Remover You'll Ever Need: Mix one part Dawn dishwashing liquid (the plain old blue kind, in the big bottle that usually sits on your sink), with two parts hydrogen peroxide (available at any drug store), pour it directly on the stain, and watch it disappear like MAGIC. If it's a big stain, as was the case with my dress, you can mix the same equation and add it to a bucket of hot water and just dunk the entire garment in there.