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I just assumed that if I'm brewing 400ml in a Clever Dripper then I should use the same grind level for 900ml in the SPB.
Oh sweet child. Glad you got it sorted. Your reasoning is why I'm scared of getting a batch brewer - it just seems so much harder to get right/experiment with new coffees when you are using so much of it per brew ya know?
JB
I'm really happy to put my hand up and call out my own lack of knowledge in the hope that my own ignorance can help anyone going through the same thing.
A while back I mentioned how I was struggling to get similar tasting coffee out of my SPB as I get from the Clever Dripper and I couldn't understand why and I think I asked a couple of questions about grind size in batch brew at the time.
Well at the time I put it down to the Wilfa Svart grinding inconsistenly, which to be fair to me was a real issue, as sometimes I'd get loads of fines and sometimes not.
Recently bought the Fellow Ode on here and while I noticed a marked improvement in consistency I wasn't getting the taste I wanted and was getting a bit disappointed.
Here's where the error I've been making comes in, I just assumed that if I'm brewing 400ml in a Clever Dripper then I should use the same grind level for 900ml in the SPB.
Since that wasn't working, I did some reading on batch brew grind size and ratios and I started learning about 3-6cm bed depth, when I should be switching to flat bottomed filter rather than the cone, and the fact that because the bed depth is bigger I should be grinding coarser because there's more time for extraction.
As a bonus I also read more about when to change grind size and when to increase ratio depending on what I'm tasting - which now seems obvious, but prior to that I don't think I really understood the fundamentals of why to vary one over the other.
So what did I get after reading and learning all that, well I turned the Fellow up to 5 (coarser, much coarser), and returned the ratio to 60g/litre and low and behold, the coffee out the SPB tastes much better and much closer to what I think the optimum taste for that coffee (Guji Flip Flops from Dark Arts) should be.
This was a few days ago and this was a long post but I'm just really pleased that I solved a long standing source of frustration for me that was as easy as, you need to grind coarser for larger volumes of coffee.