Bumpity-Bump...
Interesting. So I recently made a double batch of Dragons Blood using blueberries only - no mixed fruit. With roughly 14 gallons of product to put in carboys, I wound up using two five gallons and a three gallon to hold it all. Remember, the contents were from the same primary fermenter (60l Speigel) and the same batch. Only the carboy sizes are different at this point.
When it came time to clear, I used three products to include Bentonite, Sparklloid, and the dual packet keiselol/chitosan. As of now all three are in the clearing stages and I have to say the Bentonite is by far the worst clearing of the group. Not only is the color considerably lighter, the particulates are just sitting there suspended even after several days. Whereas the Sparklloid and keiselol/chitosan carboys are crystal clear and ready to bottle.
I'm not sure if it's an interaction with the Bentonite and blueberries or what. But I won't be using Bentonite post fermentation with blueberries again. I had an Amazon delivery today for some more Sparklloid and I think I'm going to toss that at the Bentonite carboy this evening and see what happens.