Make a basic layout note
Sketch the filter, plants, hardscape, feeding area, and open glass. During routine observations, note which areas have visible shrimp.
Use broad terms such as filter surface, moss patch, or front pane. Exact counts are unreliable when animals hide behind plants or décor.
Compare similar observation windows
Look at the same parts of the aquarium at roughly similar times and under familiar lighting. This reduces the chance that a different viewing setup looks like a behavioral change.
Record water changes, feeding, and maintenance that happened nearby. They provide context but do not prove why shrimp chose a location.
Use the map to improve habitat
If most surfaces are bare and shrimp concentrate around one stable area, consider whether additional cover would fit the aquarium. Make changes gradually.
A map is a keeper’s observation tool, not a scientific census. Use water tests and repeated patterns when deciding whether intervention is needed.
Use these as general hobby references. Test your aquarium and confirm product guidance before making changes.