System Additives and Chemicals
Penn State College of Agriculture - Cooperative
Fact Sheet #SW-161 "Septic Tank Pumping,"
by Paul D. Robillard and Kelli S. Martin - last line
of second paragraph "Biological and chemical
additives are not needed to aid or acclerate decomposition."
Fact Sheet #SW-161 "Preventing Septic System
Failures," by Paul D. Robillard and Kelli S.
Martin - page 2, Maintenance Failures, paragraph two,
"Chemical or biological additives are not
a substitute for pumping."
Science Facts, Septic Tank Systems," Michael
T. Hoover, Dept. of Soil Science, North Carolina State
University, Raleigh, SS 86-4, "Are Septic-Tank
Cleaners Necessary?" "No. These products include
biologically based materials (bacteria, enzymes, and
yeast), inorganic chemicals (acids and bases), or organic
chemicals (including solvents). They do not
reduce the need for regular pumping of the septic tank."
Tank Maintenance," K. Mancl and J.A. Moore,
Oregon State University Extension Service, Extension
Circular 1343 "Biological and chemical
additives are not needed to aid or accelerate settling