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Quote: Originally posted by Harpmaker on 26/6/2020

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Very common down here (Australia and New Zealand) to use sodium percarbonate (the main ingredient in laundry soakers). I have been using it for years and it works extremely well.https://rvbooks.com.au/napisan-and-look-a-likes-safe-for-septic-tanks-professors-view/

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Quote: Originally posted by birder99 on 27/6/2020

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If you read the data sheets for the various toilet chemical on the UK market you will see that they contain mainly surfactants and perfumes with a small amount of preservative. Elsan Blue is probably the exception which is why it works so well especially when used with solids and in hot weather. The airline and rail industries use it in bulk. If you are emptying everyday then a glug of perfumed detergent is probably all you need if you are fit and healthy. If you are worried about infections etc then wear disposable gloves when emptying the waste. If you have the trots then it is safer to use something that will kill any bugs. As most years I am in my caravan for six months or more I have got used to what works for me. I tend to use Elsan Blue and a squirt of Aldi 2in1 washing liquid. This keeps the tank cleaner than with the Elsan alone and for some reason it prevents a build up of gunge on the inner surface of the tank and therefore makes it easier when emptying. At the end of the day it is what you feel most happy to use and if you feel that you need to use Thetford or that horrible bubblegum smelling stuff then that is your choice.

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Quote: Originally posted by gailbonney on 02/7/2020

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I really struggle with the smell of the Thetford one ( I think) makes me feel nauseous . Am looking to try something different. I find that the flush pink causes black bits too. I tend not to use a flush one now for that reason but I do need to find a tank one,as we’re going to be staying in a site with no toilets in Aug!

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