i am very unhappy with the first batch i made with diamond. i might actually end up dumping these remaining bottles.
i followed a "fast" process, where it started in the low 50s for a few days, then i raised it to mid 60s for about a week until finished. then cooled it down again and bottled it after a short time for lagers, i think between 3 to 4 weeks.
on bottling day it tasted good, since then its gotten worse and worse, starting with overwhelming matchstick sulfur and now just crappy acetaldehyde, off-flavours.
this was not my normal process with lagers, which has previously been the standard low temp for a long time. but yeah, not happy at all.
i have another batch going with the repitch of it, and im doing the low and slow method to see if it helps.