After living with city sewer systems for 75+ years we now are "proud
owners" of a septic system and about to be two systems. New
woodshop/garage will have half bath and sink for cleanup on a septic.
Have read don'ts like using bleach down the sink that will kill off
the critters that make septics work and some other tips but would
really like to go to a comprehensive site for more info. Does one
exist? Shortly after moving in a phone solicitor asserted we HAD TO
use their product monthly or we'd ...! Our DIL uses something monthly
but I question 3-5 ounces down the drain into a 1,000-1,500 gallon
tank having a significant impact. Permit for new septic notes that
1,500 gallon system is required for disposal houses. Previous owner
apparently had a disposal as a switch near the sink doesn't connect to
anything and wires under the sink terminate in wire nuts. Our house
septic is 1,000 gallons. Observations welcomed.