Step 1
Capture a bucket
How to capture (reference)
Sparse
~50 PL · PL12
Dense
~1400 PL · PL12
✓White basin or bowl
✓Phone held straight overhead
✓Even lighting · no harsh shadows
✓Wait for water + PLs to settle (~60 sec)
✓4K · never WhatsApp-share before upload
Use 4K capture · never WhatsApp-share
Hatchery source
Stocking target
e.g. 40000