Does a septic system need an aerator? In some cases 25% Never 25% Not sure 50% Get Free Quotes Today! Question: Does a septic system need an aerator? Top Answer (50% of 4 votes): Not sure. Answer: In some cases Explanation: It depends on soil type. Bayshore Construction Get Free Quotes Today! Find Local Pros Free Septic System Installation Cost Estimates Related Questions How Much Does It Cost to Put in a Septic Tank? What is an Engineered Septic System? What is a Septic Baffle? What is a Septic Alarm? What is a septic Lid?