Water treatment for second runnings?

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matt76

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I'm planning to make a Baltic Porter, 5kg, 15L BIAB full-volume no-sparge.....

I have very hard water so I'll add half a Campden tablet, 5ml lactic acid and 1g CaCl to my water - standard for me and this beer style.

No problems there, all straightforward enough.....

But since there'll likely be lots of fermentable sugar left in the grain I plan to stick the bag in another 10-15L water to re-mash and get a second batch of lower gravity beer for free.

How do I approach water treatment for the second batch?

I'd add half a Campden tablet anyway...

Beyond that would I just do my normal water treatment again or do I need to factor in the fact that the grain is now wet and contains less sugar then at the start?

With nothing more than a Campden tablet added to the water I'm sure it'll still make beer, but no problem to give it a nudge in the right direction.

Cheers,

Matt athumb..
 

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