Grocery Seafood Live Tank Maintenance Log

Daily maintenance log for live seafood tanks (lobster, crab, and other shellfish) in grocery seafood departments. Covers water temperature, aeration, salinity, animal health checks, and tank sanitation per FDA Food Code 2022 and best practices from commercial live shellfish tank operators.

Inspection Details

• Inspection Date and Time
  Record the exact date and time this maintenance check is being performed.
• Inspector Name / Employee ID
  Full name or employee ID of the associate performing this inspection.
• Tank Identifier
  Select the tank being inspected. Use the label posted on or near the tank.
• Inspection Type
  Select whether this is the opening check, midday check, or closing check.

Water Temperature

• Water Temperature Reading (°F)
  Insert a calibrated probe thermometer into the tank water and record the reading. Acceptable range for lobster: 45–50°F. Acceptable range for crab: 50–55°F.
• Temperature is within acceptable range for species held
  Confirm the recorded temperature falls within the acceptable range for the species in this tank (lobster: 45–50°F; crab: 50–55°F). A reading outside this range is a critical deficiency requiring immediate corrective action.
• Chiller / refrigeration unit operating without visible deficiency
  Inspect the chiller unit for unusual noise, ice buildup on coils, or error codes on the display panel. Any deficiency must be reported to maintenance immediately.
• Thermometer last calibrated (date)
  Record the date the probe thermometer used for this check was last calibrated. Calibration should occur at minimum weekly per NIST traceability best practices.

Aeration and Water Circulation

• Air pump(s) operating and producing visible bubbling throughout tank
  Visually confirm that all aeration stones or diffusers are producing a steady stream of fine bubbles. Absence of bubbling in any zone indicates a blocked stone, disconnected line, or pump failure.
• Water circulation pump operating without unusual noise or vibration
  Listen and observe the recirculation pump. Grinding, rattling, or intermittent operation indicates a mechanical deficiency requiring immediate service.
• Dissolved Oxygen Level (mg/L)
  If a DO meter is available, record the dissolved oxygen reading. Acceptable minimum is 6 mg/L. Values below 5 mg/L are a critical deficiency.
• Aeration tubing and air stones free of visible blockage or fouling
  Inspect tubing connections and air stones for biofilm buildup, kinks, or disconnections. Replace fouled air stones per manufacturer schedule.

Water Quality — Salinity and Clarity

• Salinity / Specific Gravity Reading
  Use a refractometer or hydrometer to measure specific gravity. Record the value. Acceptable range: 1.020–1.025. Readings outside this range require partial water change with properly mixed saltwater.
• Water clarity — free of excessive cloudiness, foam, or discoloration
  Visually assess water clarity. Milky or heavily foamy water indicates high ammonia/biological load or inadequate filtration. Discoloration may indicate contamination. Either condition requires immediate partial water change and filter inspection.
• Filter system operating — no bypass, blockage, or overflow observed
  Inspect mechanical and biological filter components. Confirm water is flowing through the filter, not bypassing it. Check for overflow or leaks at filter housing.

Animal Health and Mortality Check

• Dead or moribund shellfish identified and removed from tank
  Inspect the entire tank bottom and all holding compartments. Remove any dead (limp, unresponsive, shell gaping) or moribund (sluggish, on back, not righting itself) animals immediately. Dead animals rapidly degrade water quality. Document count below.
• Number of dead animals removed this check
  Record the count of dead animals removed. Enter 0 if none. High mortality (>3 in a single check) is a critical deficiency requiring supervisor notification and investigation.
• Remaining animals appear active and healthy (moving, responsive to stimulus)
  Observe animals for 60 seconds. Healthy lobsters and crabs should show leg movement and respond when gently disturbed. Widespread lethargy across the tank population is a critical deficiency.

Tank Sanitation and Housekeeping

• Tank exterior, viewing glass, and display area free of visible debris, algae, and fouling
  Wipe down exterior glass and tank rim. Remove any visible algae, salt crust, or debris from display surfaces. A visibly dirty tank is a food safety and customer experience deficiency.
• Tank bottom and interior free of excessive waste, molts, and uneaten feed
  Inspect the tank bottom for accumulated waste, shed shells (molts), and uneaten feed. Excess organic matter accelerates ammonia buildup and degrades water quality. Siphon or net out debris as needed.
• Date of last full water change
  Record the date of the most recent full or partial water change. Full water changes should occur at minimum weekly. Partial changes (25–30%) should occur as needed based on water clarity and salinity readings.
• Corrective actions taken during this inspection (describe)
  Document any corrective actions performed during this check (e.g., water change performed, dead animals removed, air stone replaced, chiller alarm reset). Enter 'None required' if no corrective actions were needed.