Filtration Completion Check the vat every 5–6 hrs to observe changes. • Signs it’s ready: ◦ Abundant blue bubbles and purple film on the surface • Do not exceed 3 days—over-processed leaves reduce effectiveness and may spoil the batch. In colder evenings sometimes it cools and slows the process and extends ferment time, this is ok! ◦ Leaves yellowing and breaking down easily ◦ Liquid is “thick”, fluorescent aqua-green • This greenish-blue liquid is indican (indigo precursor, looks like dark antifreeze) and requires oxygen for the next step.
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