Image: Normal vs. Stuck Beer Fermentation: Visual Indicators
Published: October 5, 2026 at 4:26:46 PM UTC
Visual guide comparing normal and stuck beer fermentation, including differences in airlock activity, krausen, clarity, temperature, and gravity readings.
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Image description
A landscape-format brewery-themed comparison infographic showing normal beer fermentation on the left and stuck fermentation on the right. The composition is divided vertically down the center by a thin light line. Both sides feature large clear glass fermentation carboys containing amber-gold liquid, each fitted with a stopper and transparent airlock. The setting resembles a warm, rustic brewing workspace, with a wooden tabletop in the foreground and a softly blurred workshop or brewery background in neutral brown and gray tones.
At the upper left, a dark green rounded rectangular header reads “NORMAL FERMENTATION” in large white uppercase letters, with “Healthy and Active” beneath it. The left carboy contains cloudy golden-orange liquid with abundant small visible bubbles and a thick, pale cream-colored foamy layer at the top. Five circular white icons with black outlines are arranged vertically to the left of the vessel. Corresponding white text reads: “Consistent bubbling in airlock,” “Visible foam (krausen),” “Cloudy appearance from active yeast,” “Steady temperature (ideal range),” and “Gravity readings decreasing.” The icons depict bubbles, foam, suspended particles, a thermometer, and an upward-diagonal graph-like symbol respectively. A pale rectangular caption overlapping the bottom of the left carboy reads: “Signs of a healthy fermentation: active yeast, consistent activity, and a steady drop in gravity.”
At the upper right, a dark red rounded rectangular header reads “STUCK FERMENTATION” in large white uppercase letters, with “Sluggish or Halted” beneath it. The right carboy contains clearer amber-brown liquid with little visible bubbling and only a thin pale foam ring or layer near the surface. Five circular white icons with black outlines are vertically arranged to the right of this vessel. Corresponding white text reads: “Little or no bubbling in airlock,” “Minimal foam (flat surface),” “Clearer appearance (less yeast in suspension),” “Temperature may be too low (or too high),” and “Gravity readings remain unchanged.” The icons depict an alert-like symbol, a shallow liquid surface, amber liquid with a few suspended dots, a thermometer, and a graph with a horizontal dotted line. A pale rectangular caption overlapping the bottom of the right carboy reads: “Signs of a stuck fermentation: little activity, no change in gravity, and a lack of foam.”
Centered in the foreground between the two carboys is a clear drinking glass filled with amber beer and topped with a thick off-white foam head. On the lower left of the wooden table is an open spiral-bound notebook with handwritten text reading “Good Fermentation = Great Beer!” A black pen lies diagonally beside it. Pale grains are scattered across the table, and a shallow wooden bowl in the lower center contains additional grain. At the lower right is a small black chalkboard in a wooden frame bearing the handwritten white text “Monitor / Adjust / Be Patient / Better Beer Ahead!” Green hop-like plant material is visible along the bottom-right edge; its exact identity cannot be confirmed solely from the image. The overall palette combines amber and golden beer tones, warm brown wood, cream foam, clear glass, muted gray-brown surroundings, a green left-side heading, and a red right-side heading. No recognizable commercial branding or logos are visible.
The image is related to: Fermenting Beer with White Labs WLP644 Saccharomyces brux-like Trois Yeast