Toilet cassette fluid

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Its been discussed many times. Here's one of the numerous threads.

https://www.caravanclub.co.uk/club-together/discussions/information-technical-tips-advice/caravans/lidl-bio/?p=2

 

Are these the tabs that are used?

lidl bio tabs

Yes, not actually tablets, but pouches of liquid.

We have been using them for a couple of years now.

They are the ones I use. Only started trying them when we got our MH a year ago. Work very well much better than the Aldi blue. Also used the liquid of the same variety, as the Lidl in France didn't have any tabs.

When using the liquid pouches/sachets do they dissolve on there own or is it better to pierce them?  Also how much water do you put in?

I don't pierce them. The only water added is "all my own work". 

I have tried them and gave up. The tab didn’t even break up. The waste stayed solid an the cassette stank. 

Same method as me cyber. I can add my own water and after the cassette is rinsed there is plenty of moisture left to dissolve the sachet. I keep them in the washroom and after the cassette is emptied, rinsed and replaced one of us drops a sachet inside. As we use plain water to rinse there is no rooting about for chemicals

I use about half a litre or so of water and give it a gentle shake. That breaks down the gel and the liquid mixes.