Do You Really Need Septic Tank Additives or Treatments?

At Double Flush Septic Services we have not seen any evidence that customers using septic treatments, or septic tank additives, have a healthier septic system. We have actually seen evidence to the contrary

SO why do some septic companies swear by septic tank additives? Our guess is because they sell them. Every septic services company we know agrees that septic tank additives usually do more harm than good. So before you buy a treatment for your septic system, we want to tell you more about how they’re supposed to work, how your system naturally works, and share our experience so you can make the best decision for yourselves.

In this post we’ll try to answer the common questions – Are septic tank additives good or bad? Do septic tank additives actually work? How do I keep my septic tank bacteria healthy?

SEPTIC TANK ADDITIVES: DO SEPTIC TREATMENTS WORK?

What to Know About Septic Tank Additives Before You Buy

There are a lot of products you can purchase at the local hardware stores and online that claim septic tank additives, or septic system treatments, are advanced enzymes that break down household waste or natural active septic bacteria to reduce tank build-up and prevent septic tank backups. At Double Flush Septic Services we have not seen that to be true and any difference we have seen a septic treatment make is actually to make the septic system worse.  To understand these claims, we must first understand how your septic system works in its natural state.

Septic tank system with Double Flush septic services for efficient waste management.

Natural Septic Tank Bacteria Process

Every active septic system has bacteria in it, without using additives, and you need that bacteria to help your septic tank process waste. Beneficial bacteria, which is naturally contained in the waste you flush down your toilet, is constantly moving around in the septic system, breaking down solids, turning them into liquid waste.

After flushing waste down the toilet, these naturally-occurring anaerobic bacteria take about two days to breakdown the solids into liquids. Waste that can’t be broken down sinks to the bottom as sludge while the rest floats to the top as scum or eventually goes out to the drain field as processed wastewater, having been “processed” by the bacteria in your septic tank.  When the liquids in the tank reach the drainfield, they drain safely into the yard.

As you flush more waste, the sludge level increases (amount of solids in the bottom) which is why you have  septic tanks cleaned every two years. You may need more cleanings if you have a bigger household, smaller septic tank, or large gatherings when your system is processing an increase (read: SEPTIC EMERGENCY: FLUSHABLE WIPES CAN RUIN A PARTY before hosting an event).

Our Experience With Tank Additives

Knowing how the septic system works in its natural state, for us to recommend a septic tank additive as effective, we would need to see a substantial difference in how the bacteria is processing waste. In our experience, we have not noticed a difference in a reduced amount of solids (sludge) for our customers that diligently use septic treatments.  Some actually have shown detrimental effects with either:

  1. A buildup of a sawdust material on the top layer (scum layer in the diagram), and/or
  2. Suspended solids. Once the scum layer is thickened with the sawdust-like material, we’ve seen solids suspended on the top layer.  This could lead to less sludge, but only because the solids are being pushed out to the drain field before being treated by the bacteria – which is very dangerous.

What Does the EPA Say About Septic Additives?

On the EPA.gov website:

“EPA does not make recommendations on individual septic system products. Commercially available microbiological and enzyme additives are promoted to reduce sludge and scum accumulation in septic tanks. However, these additives are not necessary for a septic system to function properly when treating domestic wastewater. Use caution when using additives in your septic system as they may decrease the performance of septic drainfields, which treat the wastewater from the septic tank. In general, do not use additives made of organic solvents or strong alkali chemicals because they pose a potential threat to soil structure and groundwater.”

THINGS THAT SHOULD NEVER GO IN YOUR SEPTIC TANK

  • Diapers
  • Cigarette butts
  • Antibacterial soaps
  • Trash
  • Condoms
  • Bandages
 
  • Dental Floss
  • Cat Litter
  • Pharmaceuticals
  • Other non-degradable products
  • Grease
  • Rags and strings
  • Coffee grounds
  • Paper towels
  • Baby wipes
  • Sanitary napkins and tampons

REDUCE EMERGENCY SEPTIC SERVICES WITH MAINTENANCE

You can do your part to keep your septic tank healthy and reduce the frequency of septic tank pumping. First, don’t put anything down your septic system that is non-biodegradable, such as cigarette butts, diapers, paper towels, and more. Plus, installing an effluent filter, which helps to decrease the number of solids that leave the tank helps promote your septic tank’s health.

EMERGENCY SEPTIC SERVICES NEAR YOU

We service the Northern Ohio area including Erie, Lorain, Medina, Portage, Stark, Summit and Wayne counties. Our family-owned septic company is the one to call for all of your emergency septic tank services, including septic tank pumping. We can work around your schedule when it’s convenient for you, including working on weekends and evenings. Septic services include installationsrepairsinspectionscleaning and maintenance plans.   Rest assured, when you partner with our local, family-owned septic company, your Northern Ohio home or business will be well served. Call to get started today!

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Albert Shannon profile picture
Albert Shannon
August 20, 2026
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Came through when needed
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Donna Eisenhardt
August 19, 2026
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Joe , from Double Flush , was here early. He completed the septic cleaning , cleaned up carefully, and was very professional! I felt the price was very reasonable! We will definitely use their services again!
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Japclev
August 17, 2026
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Doubleflush came out twice to pump. My socks in tank needed replaced. They recommended ASI who completely ruined my system when they cleaned the socks. Then double flush recommend wires from septic be brought above ground and recommended a electrician who completely screwed the electrical with the septic. I feel that once I ripped ASI on review- double flush was purposely causing issues. Never using again.
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charles McKee
August 14, 2026
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Had tank pumped and cleaned by double flush. Excellent service and very friendly people. I definitely recommend them and will use them in the future
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Darlene Toth
August 10, 2026
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Just moved to the house with septic system. Employee took time to explain several of our questions. Highly recommend!!
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Roger Schulte
August 7, 2026
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On time prompt and very friendly
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Itchymoche2
August 6, 2026
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Fast affordable service.
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itchymoche
August 6, 2026
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Fast service at an affordable price. Highly recommended.
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Andrew Szczepanik
August 4, 2026
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Scott was timely and extremely professional and personable. Our home was having backflow issues so we needed a flush quickly and Double Flush was able to accommodate. Scott followed up with us afterwards, explained the work that he did, and made sure we didn’t have any other questions. Price was reasonable as well. Highly recommend this company.
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Kate Postlethwait
August 3, 2026
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Blown away by the professionalism and quality of work they provide. In a tight spot you can rely on these guys to get the job done