Petco Text Logo
Petco Pet Logo

Why did my fish's color fade after Malachite Green treatment?

Updated On September 23rd, 2025

When I used Malachite Green- F, after 24 Hours My Blood parrot fish and yellow parrot fish color has fading ,so I changed water after that this condition ,why do this changing color in fish after medication ?

1 Answer

Most Helpful Answer

Image profile

Answered By Angel Alvarado, LVT

Licensed Veterinary Technician

Published on November 8th, 2018

The color change may be due to the illness or stress. Perform partial water changes, no more than 30% at a time, and monitor the fish. Consider adding an airstone since this medication can affect oxygen levels in the tank further contributing to stress.

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