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Some folk have posted how they've had success using various supermarket own brand washing liquids in their cassettes...

 (..it may be worth just  doing a search on here..)

I once picked up a bottle of the Blue diamomd 10% fluid thinking it was good value, but then found that it was halpf the strength of the normal Blue diamong fluid so you needed to use twice as much.

I now use either elsan traditional toilet fluid which is releatively cheap at one of our local caravan dealers or preferably Lowdhams toilet blue which is full strength fluid and sells at £4.99 for 2 litres.

We use blue diamond. It's quite cheap at go outdoors. it works well too no smells even after i forgot to empty the loo a week after we came back... yuck! no smell though.

http://www.blue-diamond-products.co.uk/toilet_fluids.htm

I suppose for a good comparisen we need price per litre and how much you have to use.

For instance Fenwicks Top and Tail is £10 in Halfords for 2.5 litres and each dose needs 125ml in bottom and 50ml in top = 175ml per dose = 14.29  doses per 2.5l = 70p per dose !?? Seems a lot !!!? Have I messed up the calculation ? If not I might have to start using the communal facilites !

One Chem from Johns Cross is £10.99 for 1ltre, each dose is 20ml in bottom, 5ml in top = 25ml per dose = 40 doses per 1litre = 27.47p per dose ! Bargain ! Never used it before but I think I may start now .... Oops forgot postage so it will be more.

All based on a 20litre waste tank and an 8 litre flush tank. I think I feel a spread sheet coming on !

Yes I am very bored as I am waiting for the plumber to come and unblock the drains !!! 

Still waiting !

Very bored now.....

Post last edited on 28/10/2010 12:12:40

Quote: Originally posted by beefysmum on 25/10/2010

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I found that elsan double blue was more economical than the normal strength ones . £8.99 here for 2 x 1 litre bottles of double concentrate, so you only need to use half the amount ,and of course it means smaller bottles too, but it will also depend if you have to pay postage , or whats on offer at your local shop.
I also much prefer the scent of this one to the thetford brand.

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How much do you have to put in ?

Yeah,as I mentioned earlier,quite a few people use cheap,bio clothes washing liquids...supposedly cheaper than "proper" chemicals and used in the quantities/dilutions we're talking about here,probably a lot less harmful.... 

The SOG system you talk of,has been discussed on here...some people say that it just "blows" the stink outside onto next doors pitch ...and that the content really smell when you empty the cassette  (as no chemicals are used)..

However others swear by 'em..and say that they'd never have a van without the system fitted...