A septic tank uses bacteria to break down human waste products so that the eventual liquid that returns into the earth soak away or river is clear and free from harmful chemicals. Chemicals like formaldehyde kill off this 'good' bacteria make the septic tank smell and pollutes the environment that it ends up in(the earth).We have tried various environmental toilet chemicals, some are septic tank friendly some are not and still kill the 'good' bacteria, some smell ghastly when used in the chemical toilet and the waste breakdown process starts. Even if the campsite you are using has mains drainage why would you want to use all of these seriously harmful chemicals in the drain system anyway, we have a planet to consider for our children's sake. A septic tank is a way of life if you live in the countryside as you have to consider all chemicals used around the home if you want your tank to work and not become a waste cesspit's have found by trial and error that Fenwicks Top and Tail meets my requirements for a toilet chemical fluid that does everything you need e.g.-it works, it smells o.k., it lubricates the rubber seals, it comes in one bottle and you don't need other chemicals for flushing or clearing black spots that can happen in your flushing water. I wish it had been on the market years ago!!! I sell it per dose (to cover top tank and bottom tank) for 40p this barely covers the cost of the fluid so that people do not have to buy a whole bottle. I would have thought that adopting this type of stance in the use of chemicals would have been appositive reason for visiting my campsite. Hopefully this answers the points raised by the other contributors, if anyone knows of any other fluids that can meet my requirements I would be pleased to hear about them. The views stated above have been formed by my own experiences and from reading various books and articles on the workings of septic tanks. Jim McCosh Proprietor Walled Garden Caravan and Camping Park,Kilkerran,Maybole,Ayrshire.
________________________________________