Petco Text Logo
Petco Pet Logo

How long to wait before adding new fish after ich treatment?

Updated On September 23rd, 2025

I recently lost more than half of my fish tank due to ich. I did the “super ick” medicine and managed to save the remaining fish in my tank. I was wondering when it was safe to introduce new fish into my tank so that I can rebuild it.

1 Answer

Most Helpful Answer

Image profile

Answered By Angel Alvarado, LVT

Licensed Veterinary Technician

Published on February 1st, 2020

If the infection is cleared, wait a couple weeks and then consider repopulating the tank. Ideally, you should set up a quarantine tank for incoming fish before they go into the main tank. Monitor them for a week or two to confirm good health. You may even want to administer an antiparasitic medication while in quarantine to be safe.

Vote icon

1Pet Parents found this answer helpful

image
Have A Vet Question?

Book an appointment with the pros – our expert vets are here to help.

Sponsored