SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/fish-quarantine-restart

During quarantine, you add another new fish to the quarantine tank. What happens?

The quarantine clock starts over.

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  1. The quarantine clock starts over ✔
  2. Nothing, the timer keeps going
  3. Only the newest fish gets a later end date

Why: Merck says once quarantine starts, no new fish can be added, or the quarantine period must be restarted. Each newcomer could bring its own germs.

Huh, didn't know that: Merck says quarantine tanks should be completely broken down and disinfected between uses.

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References

Answer: The quarantine clock starts over. Merck says once quarantine starts, no new fish can be added, or the quarantine period must be restarted. Each newcomer could bring its own germs.

  1. Merck Veterinary Manual: Routine Health Care of Fish www.merckvetmanual.com/all-other-pets/fish/routine-health-care-of-fish
    Once quarantine is started, no new fish can be added or the quarantine period must be restarted.
    Checked 2026-10-11.
  2. Merck Veterinary Manual: Routine Health Care of Fish www.merckvetmanual.com/all-other-pets/fish/routine-health-care-of-fish
    Quarantine systems should be completely broken down and disinfected between uses.
    Checked 2026-10-11.

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