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Heater failed! How to keep my new tropical fish warm in its bag?
Updated on September 23, 2025
hello, i have a tropical fish and the heart didnt work for the tank how do i keep my fish warm its still in bag
1 Answer
Most Helpful Answer
Answered By Angel Alvarado, LVT
Licensed Veterinary Technician
Published on October 13, 2017
You can float it in some warm tap water but it will need to come out of the bag before oxygen levels drop and waste levels rise. Hot water bottles or a light over the tank may also keep temps out of dangerous ranges until you replace the heater. Buy two and keep a spare ready just in case.
1Pet Parents found this answer helpful