Fish — environmental enrichment & exercise (toys, foraging, hiding, exercise, preventing boredom)
Source: first-hand owner-practical care page, saved to source_file; every claim below is a C1 byte-substring of it.
Claims
For example, kuhli loaches and many catfishes will need caves and hides to help them feel secure.Just as with any electrical equipment, thermostats and heaters can fail, so use a digital thermometer and check the temperature every day.Keep the tank lights off for the rest of the day so that the fish can rest and explore in their own time.It's also important to supplement fish food flakes with other foods for balanced nutrition and enrichment.- `Enrichment Give your fish an interesting environment to live in by including the following in your aquarium:
Substrate : this is the sand or gravel on the bottom.`
Shelter : branches and sturdy rocks also provide shade and shelter, which are important for your fish to feel secure.Keeping them in groups also means they'll be more relaxed and will come out from hiding more readily.
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Source: pdf-raw/companion-care/exotic_rspca_fish.txt · https://www.rspca.org.uk/adviceandwelfare/pets/fish