Braggot issues

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SilentJimbo

Worker Bee
Registered Member
Oct 9, 2012
159
5
18
Hampshire, UK
I'm currently brewing up two batches of near identical braggot (the only difference is the hop varieties used). Checked on them today, and found that one was significantly darker than the other (one is comparable to a pale ale, the other to a brown ale). Not seeing any reason for this (same ingredients, yeast from same packet, same nutrients etc), I decided to check the gravities:

Light one: SG 1.019, pH 3.72
Dark one: SG 1.019, pH 3.73

So, practically identical, and still some way to go (OG was 1.052).

I then decided to move them out of the brewing cupboard to where I could better compare the colours. In doing so, the pictured below appeared underneath the krausen.

Does that look like something I should be concerned about?
Any theories as to why two basically identical recipes at near identical points in their fermentation would have such a different appearance?
 

Attachments

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6oz Crystal Malt 30L steeped for 30mins.
1/2oz Hops, 20min boil.
1/2oz Hops at flameout.
Cool.
Add 1.25lb Honey.
Top up to 1gal.
Add 1/2tsp Calcium Carbonate.
Aerate.

Yeast: S-04
Nutrients: 1/2tsp Tronozymol at end of lag, 1/2tsp after 48hrs
 
If it is just yeast, the two issues could be related - the yeast is not properly in suspension, therefore not contributing as much to the colour.