I need some advices with something that happened last time I brew, after I brewed 250 litres of a golden ale, with 35 kg of base malt with a kolbach value of 44, 2.5 kg of rolled oats and 4 kg of cane sugar, a protein rest at 50ºC 10 minutes, and then 65ªC and finally 75ªC,before filter, I fill some kegs and pressure it with co2, this beer had very good and impressive head retention, but, after filtering with diatomaceus earth it disapear, now my beer had poor head retention, what could be the reason for this?This is the first time I use earth to filter.I hope u can help me.
best regards
best regards
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