Cool, I will probably shell out the $25 then. I just did some more reading and ya it looks like I can do lots of batches for the $25. Costco sells the huge bags of the mixed berry and I am cool with the raspberry being more dominant. Thanks for the info
The philly sour is a different beast. It's a yeast (Lachancea) that produces alcohol and acid. I haven't used it so I don't know how it would go in this style of beer.
I use sour pitch because it's 20AUD (about 13USD) here, and we don't have goodbelly in Australia. I don't know why sourpitch is cheaper here than in the US when all other yeasts are quite a bit more expensive. Probiotic capsules are expensive and reportedly unreliable, so sour pitch is my cheapest reliable option.
In your situation, if you're brewing a one-off sour I'd suggest using goodbelly. If you want to do lots of sours, fork out for the sour pitch - that $25 will work for at least 50 gallons of sour beer.
Regarding the fruit, the mixed berries will work but be aware that the raspberries will dominate. If you want a bit more blackberry and blueberry flavour, tip one of these in at bottling
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