Below you will find answers to some of the most frequent questions we have received from customers recently. Should you need further information and advice, before or after purchasing, then please send us a message using CONTACT US and we’ll do our best to help you.

Originally developed for waste water treatment by water supply companies, Muck Munchers are a proven biological treatment for digesting organic waste, including fats and greases.

When a property is sold, the owner must give the purchaser a written notice stating that a small sewage discharge is being carried out and give a description of the waste water system and its maintenance requirements. This is not onerous – you need to inform the buyer that occasional checks are made, that you use a biological waste water treatment to reduce sludge and improve discharge quality, and empty should excess sludge accumulate. If you currently have a septic tank that discharges to surface water (that is, into a ditch, stream or river – there are special rules for reed beds) then the sale will trigger the requirement to replace or upgrade the system. Visit for further information. Buyers should satisfy themselves that any system is in good working order and does not cause pollution. There could be costs involved in engaging a surveyor to inspect the system and ongoing maintenance inspections. There can be further costs if a septic tank needs to be upgraded or replaced or does not qualify for exemption under the Regulations. It is important to identify the location of the system and the buyers solicitors should check that appropriate rights and obligations are in place if the system is located on someone else’s property.

If you have an existing septic tank that discharges in to a watercourse, river, stream etc… you will have to either upgrade to a sewage treatment plant or install a drainage field system, because the discharge direct from a septic tank isn’t clean enough and will, in all probability, be causing pollution. For more details please visit

No. Muck Munchers XL and Kick-Start Bio-Booster are based upon entirely naturally occurring products and contain harmless bacteria.

No. Because Muck Munchers are entirely biological they actually have a beneficial effect upon the environment. We do, however, recommend that you take reasonable precautions, washing your hands after use, avoiding eye contact and inhaling or ingesting the product.

Muck Munchers XL contains sufficient for a normal sized family septic tank and is guaranteed for a household of 4. If you have more than 4 people in your household, you should consider doubling up the quantity of Muck Munchers Solu-Packs each month or, even better, use them at 2 weekly intervals.

Muck munchers do indeed digest grease and fat, which is a major cause of blocked drains both in pipes to the tank and the outflow drain-field pipes from your septic tank system.

When you flush Muck-Munchers down a sink or toilet, a proportion of bacteria will adhere to drainage pipes, where they will help digest organic waste that has coated them.

Stuck for choice. When using Muck Munchers Bio-Booster use a toilet that is the furthest from the drains leaving the house. With monthly Muck Munchers Solu-Pack treatments, use different toilets, or, if you have a slow running drain from a bath, basin or sink, dissolve the Solu-Pack in a few litres of luke-warm water, leave for an hour and then discharge.

Not always. If you discharge a lot of chemicals, detergents, fats and greases, antibiotics in to the system or if it’s already under stress you may either need to add more frequent Muck Munchers Solu-Packs or empty the Septic Tank or Cesspit. What you should experience is far less frequent emptying, together with a healthy, odourless tank with more effective outflow drainage.

This is the perfect time to start using Muck-Munchers to establish a very active bacterial population and a very healthy tank.

Muck Munchers are indeed effective in winter. You might not be in the garden – you might not notice the smells. But underground the septic tanks are warm, from bath and shower water, and bacterial activity. The bacteria are active and going about their business, doing a really effective clean-up job. So come summer you should be completely odour-free with the tank working at peak performance.

Muck Munchers Kick-Start Bio-Booster introduces literally billions of bacteria in to you septic tank system that quickly generates aerobic activity even in pretty stagnant systems. A fairly healthy tank may not need it. But to give you a no-quibble, money-back guarantee, we’d prefer you use it. We also want you as a life-long customer so we need to guarantee your success.

The answer is a definite yes. Muck Munchers are the perfect alternative to more frequent cleaning and emptying Klargester sewage.

Muck Munchers can help, but not in all situations. Cesspits and Septic Tanks can overflow for two reasons: blocked drainage-fields caused by poor tank activity or water-logged ground. Overflows in themselves can also create water-logged ground. If your tank is already over-flowing, we’d recommend that first you empty the tank, then start using Muck-Munchers immediately. Use a total deep clean to activate bacteria in the drainage field. Regular use of Muck Munchers will significantly reduce the chances of overflows, except where the area is water-logged, inhibiting the escape of ground-water.

On the contrary. By creating an active aerobic environment, waste becomes more fluid, making it less demanding on such equipment as pumps, reducing wear and tear and extending pump working-life.

Yes. It’ important to understand that Detergents and Bleaches destroy bacteria. The healthier your septic tank, the more efficiently the bacteria population can cope with pollutants. Regular monthly Muck Munchers Solu-Pack treatments are designed to help counteract the impact of detergents and bleaches.

No. By digesting sewage and organic waste, the waste water entering the surrounding soil area is cleaner and purer, resulting in a healthier environment.

To perform effectively, Septic Tanks rely on aerobic bacterial activity to degrade and digest sewage and organic sludge. By increasing that activity, Muck Munchers digest the waste reducing the chances of over-flows, sewage back-up and clogged drains. As waste is significantly reduced the need for emptying septic tanks is also reduced and in many instances can be virtually eliminated.

If there is insufficient microbial activity in a septic tank the ‘waste water’ flowing from the tank will contain sewage, fats and grease that can easily clog the drain-field pipes and the little drainage holes within them, through which waste water normally percolates through to the soil.

Provided there is some water flow in the drain-field, Muck Munchers can, over time clear and restore a partially blocked drain-field. To ensure maximum performance, Bio-Gard produce Muck-Munchers Deep Clean treatments to provide very high levels of biological activity immediately in emergency situations.

You can use Muck Munchers in all Septic Tanks and Bio-Digesters, including Tricel, Klargester, Clearwater and Allerton.

Muck-Munchers is particularly suited for Septic Tanks that have periods of infrequent use, which can easily become inactive through lack of use. Hence, as many customers tell us, you’ll find Muck Munchers will provide a trouble-free sewage waste solution in second homes in the UK, Ireland and abroad. Most countries have no special regulations, as Muck Munchers have a very positive environmental effect. If in doubt it might be worthwhile checking. If you can’t re-charge Muck Munchers every month, then when you arrive, add ‘the missing months’ treatments and this month’s treatment soon after you arrive.

Our Guarantee to the Environment

It is a principal ethic at Bio-Gard that any product we sell will have no detrimental environmental impact.The Government and Environment Agency have concerns about waste water from effluent treatment plants, septic tanks and cesspits, and, pollution of water courses. Muck Munchers natural, non-chemical, non-toxic, non-pathogenic formulations ensure a very positive effect on reducing any pollutants, ensuring the resulting water released in to the surrounding soil is cleaner and purer.