Couldn't tell you Arry I saw that nodig guy charlesdowding use it. I found a small tub than the one I linked to. But you only need a teaspoon in like 5 litres so it will last until you die lol
https://charlesdowding.co.uk/community/forums/reply/bacillus-thuringiensis/
this is the one i got
https://www.ebay.co.uk/i/123740427659?chn=ps