Have 60 gal tank with 2 largish Ryukin goldfish, doing well together in this tank for several months. I added 3 times different smaller Ryukin from different sources, acclimated by floating bag method, put in the tank with the larger Ryukin. All new fish died within 3-5 days, w/ signs of swim bladder problem - not remaining upright, then dies. Water tests all zeros, using Safe, API proper ph 7.5 & bacteria. Temp 78. Tank cleaned often.. Eat soaked Hikari sinking mini pellets, peas. Ideas?

Updated On July 23rd, 2017

Pet's info:

Image profile

Answered By Kelvin Fujikawa

Aquatic expert

This question includes photos that may contain sensitive content. Click to view.

View more to consider that the photos may include sensitive content.

You mention that your water tests all zeros. Which parameters are you referring to ammonia and nitrite? If so, have you measured your nitrate level? Though not as toxic as ammonia or nitrite, nitrate is still harmful to fish especially in concentrated levels. Please test your nitrate levels and if your levels are higher that 40 ppm, perform a series of small water changes (10%) every other day to slowly lower your nitrate level to under 40 ppm.

Vote icon

1Pet Parents found this answer helpful

Other Answers

See More Answers
image

Have A Vet Question?

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

Sponsored