JR is on the money with content and is the most I've come across. Keep an eye on that as even the name brand does not have as much as generics.
I've posted the recipe for loo juice elsewhere which works for me, here it is again
LOO JUICE
Add 2 measures (inside container lid) of Woolies Home Brand Nappy Treatment Plus (Napisan works well too) into a jug with 1.5L of warm water and stir until dissolved. Add a squirt of Morning Fresh liquid detergent - this helps to keep the inside of the cassette clean. Also add a few drops of Eucalyptus oil
Place the empty cassette into it's receptacle and pour about 3/4 of the mix down the toilet with the vent fully open, then close the vent & add the remainder of the mix and allow to sit in the toilet until it's used again. Flush normally. This will assist in lubricating the seals of the vent.
Adding a squirt of Morning Fresh to the flush tank (after filling it with fresh water) will help keep everything clean.
If you don’t have a flush tank use a squirt bottle - half a cap of nappy cleaner, squirt of Morning fresh and a few drops of Eucalyptus oil and top up with warm water to dissolve. Just give the bowl a squirt after flushing.
Note: Some people prefer to use 2 dessertspoons (1/2 capful) of nappy treatment to a small amount of water (2 cups of water) in the bottom tank. Most agree that a squirt of dishwashing liquid in the flush tank helps to keep everything clean.
happy emptying
cheers