Scalable for Large & Shared Septic Tanks

Customer Comment

“I’ve become a big advocate of your septic waste digester products since previously having had problems with a Klargester biodisc sewage plant. Your products helped enormously after bacteria were killed off in the plant following a chemical contamination and we had to fully clean down and regrow the bacteria on the discs – all operating within stringent Environment Agency permit to discharge regulations.

We’ve since had a new air pump sewage plant installed, things are working well and I plan on continuing with regular dosing of your Mega Munchers sachets“.

Luke Morley

Mega Munchers – The Large Septic Tank Treatment

For Large and Shared Septic Tanks

12 monthly programme

+ tank activator and oxygenator pre-treatment

Scalable Larger System Treatment Programme

Price £98.50

The problems encountered by large septic tanks are not dissimilar to those experienced for smaller domestic septic tanks.

The main difference is the volume and the control of what users are flushing down into the septic tank system, be they homeowners, visitors, clients or employees.

The Benefits of Mega Munchers 12 Month Pack

  • Easy and Safe – No Detrimental Environmental Effects
  • Cleaner, Purer Effluent Outflows - Improves Analysis of Statutory Authority Sampling
  • Vastly Reduces Pump-Outs - Lower Cost, Lower Business Impacts
  • Digests Waste Residues on Pumps and Aerators - Reduced Maintenance Costs
  • Broad Microbial Spectrum - Digests Fats, Oils and Greases & Paper
  • Reduces Unexpected Smells & Overflows - Minimum Guest Impacts
SKU: MEGAX12 Category:



Mega Munchers – The Large Septic Tank Treatment is an easy-to-use, 12-month, flushable soluble sachet treatment. It has been designed especially for homeowners who share a septic tank or those who have larger scale septic systems.

It is ideal for all rural hospitality facilities, which rely on septic waste systems, particularly:

• Camping and caravanning sites
• Holiday cottages and lodge complexes
• Pubs and hotels.

Problems Encountered by Large and Shared Septic Tanks

Large and shared septic tanks have higher demands placed on them, so owners tend to lose a certain element of control.

Many holiday makers are unaware that the hotel, bed and breakfast or rental cottage they are staying in is not connected to the main sewage network and will have no idea of the care required to maintain a healthy septic tank system.

As such, large and shared septic tanks frequently suffer from foul smells, slow draining sinks & baths along with problems with soakaways.

The Importance of ‘Good’, Large Septic Tanks

Due to the very nature, many owners of large and commercial septic tanks are business owners. Where customer retention and repeat business is key, you don’t want to put guests, clients or visitors off with bad smells from your septic tank.

In addition, as business owners, we appreciate the cost of running a business, and where possible we all want to save money. Using MEGA MUNCHERS – The Large Septic Tank Treatment will save you £000’s on expensive pump-outs, with effective management of waste and improvements to pumping and aeration equipment performance, reducing wear and tear, maintenance and the chances of failure.

Through better septic waste digestion, the likelihood of foul smells, blocked drains and overflows at peak periods is minimised, improving overall guest satisfaction levels.

Commercial Grade Septic Tank Treatment

Mega Munchers is the ultimate non-toxic, natural biological septic tank cleaner providing effective treatment, all-year-round, it includes a specially formulated biomass oxygenator treatment to quickly activate your entire septic system and drainage-field outflow network.

Just like our market leading Muck Munchers, Mega Munchers is formulated with a broad spectrum of microbes to digest up to 97% of toilet waste, fats oils and greases, and of course, paper too.

Whilst treating a problem with the secondary tank chamber should start to clear up ‘black-slimy’ anaerobic bacteria and grease in the drainfield, if you also have very boggy soil around the tank, it should be treated too.

The problem that you are experiencing is that not only have the outflow drains become far less effective, the surrounding soil particles have been coated with contaminants blocking the ability for free drainage in to the surrounding area.

The recommended treatment programme is

Treat the Secondary Chamber as described in the section above

You will then need a pack of 1 litre Oxy-Tonic Bio Accelerator and Muck Munchers XL sachets

Dilute 50 ml Oxy-Tonic in a 10 litre watering can and water over the boggy area

Next, dissolve a Muck Munchers soluble sachet in the 10 litre watering can and water over the same area.

Now repeat again in the next day or two, and then with a single treatment weekly for the next 3 weeks.

How to Use

Mega Munchers - The Large Septic Tank Treatment

Add a Mega Solu-Pack Each Month Then Just Flush and Forget!

1. Flush the 1 litre container of Oxy-Tonic down a toilet or pour direct into the inward tank chamber. For optimum effect, apply when there are minimum discharges to the tank for for a few hours.

2. Next, take 3 of the Mega Munchers Soluble Sachets and flush down a toilet, one by one, or drop directly in to the inward tank chamber.

3. It’s best to not flush again for a few hours, as some of the microbes will then start to attach themselves to organic material in the drainage pipes and help digest that too – leaving you with cleaner inward drains.

4. Refer to the chart below for the frequency of further treatments which you simply flush down a toilet as described in point 3.

TIP– If you have a slow-draining sink, you can dissolve the Solu-Pack in luke-warm water last thing at night. Leave it in the sink for 10-15 minutes and then let it flow into the trap and drain. Leave any residue in the sink until morning before flusing it away. It will then help clean foreign organic material from the drain as well as your septic tank.

Have you considered.…

Muck Munchers + FREE Bio-Booster – Septic Tank Bacteria Treatment

Top-Selling Septic Tank Bacteria Treatment

Price £34.95

Price £34.95

Oxy-Tonic Septic Tank Accelerator

Accelerates Septic Waste Digestion

Price £19.95

Price £19.95

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4.7 / 5 rating from

1 reviews2 reviews3 reviews4 reviews5 reviews

Over £1,000 Saved on Septic Pump-Outs

Muck Munchers is an excellent product, so simple and easy. Our yearly bill was £120 ten years ago!  But we haven’t had to empty the tank since using MM and must have saved well over £1,000. 

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Septic Friendly Cleaning Products

Great products, thank you. My kitchen floor keeps so much cleaner with Eco Floor, my sink, shower and wash basins smell ok with Digesta and Eco Toilet works well, as do the Muck Munchers sachets. 

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Working Brilliantly in Bio Klargester

We have been big fans for about 5 years and still don’t need our Klargester pumping out yet!

1 reviews2 reviews3 reviews4 reviews5 reviews

Great Product Great Value

So easy to use; so easy to store; works so well, there’s no point in looking for any other product. For a year’s supply, a very fair price.

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Digesta Digests It

Really rate this product. Stuck some down in the showers and the water flows down the plug hole really well now. Also great at removing grease from the kitchen sinks.

1 reviews2 reviews3 reviews4 reviews5 reviews

ECO FLOOR Keeps Floors Cleaner Longer

Thanks for floor cleaner. I am so impressed with it. It cleans brilliantly and the results have been outstanding. It really does seem to leave the floor cleaner for longer too.

1 reviews2 reviews3 reviews4 reviews5 reviews

The Answer to Doggy Smells

Just ordered more ECO FLOOR Cleaner. Nothing got rid of the dogs’ smell. Well not until started to use ECO FLOOR.

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Septic Tank Pump-Out Driver’s Comment

Our sceptic tank emptier is going to use Muck Munchers because he was so impressed – only 6-8” of sludge after 9 years for an 8 man tank.

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