Go Back   Aquarium Advice - Aquarium Forum Community > Freshwater > Freshwater & Brackish - Coldwater, Native Fish & Ponds
Click Here to Login

Join Aquarium Advice Today
Thread Tools Search this Thread Display Modes
Please support our sponsors and let them know you heard about them on AquariumAdvice.com
Old 03-04-2022, 04:40 PM   #1
Aquarium Advice Newbie
Join Date: Mar 2022
Posts: 1
Bullying in goldfish

Hi all,

I currently have 2 fancy goldfish (a black moor and I'm not sure what type the other one is but it has an egg shaped body and is definitely fancy rather than common) in a 94 litre tank. They have been together for around 18 months and until very recently got on very well. However, for the past month or so, the unidentified fancy has started bullying the black moor. He chases and nips at the black moor a lot and recently the black moor had torn fins due to this. I put a tank divider in there to help the black moor heal, but I realise this isn't a long term solution. The black moor healed well so I took the divider out yesterday but the nipping has started again. Nothing has changed in the tank over the last month at all, however the unidentified fancy has grown bigger than the moor since I bought them.

Water parameters are:
- 0 ammonia
- 0 nitrite
- 40 nitrate
- 7 pH
- 0 KH
- 30 GH

25% of the water is changed usually once or twice a week.

I'm concerned that perhaps the tank is too small, which would be so upsetting. I bought way bigger than the pet store said I would need to try and avoid having problems. I adore these two fish so any advice you can give me would be amazing.

Thanks in advance!

Goldie28 is offline   Reply With Quote
Old 03-05-2022, 03:07 AM   #2
Aquarium Advice Addict
Community Moderator
Autumnsky's Avatar

POTM Champion
Tank of the Month Award
Join Date: Apr 2012
Location: Northern Colorado, USA
Posts: 16,683
Welcome Goldie28!

It is SO frustrating that the store people give inaccurate advice.

As for the tank, a 94L would be 28.8G And a much too small tank for full grown fish. I can't even imagine what size they recommended would be fine.


Check a look at what size your fish could have aspired to be! It is truly difficult to understand that a little 2-3 inch / 7.5 cm fish could have the ability to be a softball in around a year!!! Granted those are usually show fish genes, but I think one pic was just a regular fancy GF from the store.

They can bully / harass their tank mates. And I will check for the thread which discussed putting the fish in a time out net and training it that the behavior is not acceptable in the tank, . I haven't used that for a GF but I did do it with some other fish I forget at the moment which one and after a few times it stopped bothering the other fish.

Other things could be the water parameters are out of the safe zone, Ammonia, NitrIte and Nitrate. If the water parameters were checked before the pwc, then You would have the most accurate measurement of what is going on in the tank. And just checking if the water parameters were checked at the time before a maintenance pwc, or after?

They could be arguing over dominance. One could just be a big jerk.

You can try removing the biter for a day or 2, and rearrange the tank, even if you plan to put it back the way it was (take pics to remember how it looked, lol).

Adding some long stem plants, even plastic ones, to break up the areas somewhat.

The adding the biter back into the tank, and in theory, the tank would be now the one that got bit's domain. Sometimes that works, and sometimes it could be a jerk fish who doesn't play nice.

How big are the GF now? Boulder Marble, Ping pong ball, Golf ball, baseball sized?
New to FW fish? First tank in a long time or EVER??? Need some info on keeping fish?

Start here - Aquarium Advice Article

FW Favorites right now Clown Loaches, any shrimp - SW Vase Red Mangroves
Autumnsky is offline   Reply With Quote

bully, bullying, fish, gold, goldfish

Please support our sponsors and let them know you heard about them on AquariumAdvice.com

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
goldfish mating or bullying? cheeky_monkey Freshwater & Brackish - General Discussion 37 09-03-2012 08:24 AM
?? Goldfish social behaivor or bullying? freakinfishgeek Freshwater & Brackish - General Discussion 0 02-03-2010 01:12 PM
Bullying kristin27 Freshwater & Brackish - General Discussion 5 06-30-2005 11:50 AM
female gourami bullying and a female betta question too SwerveDriver Freshwater & Brackish - General Discussion 5 10-04-2004 01:10 PM
Bullying! hertsboy Cichlid Discussion 7 12-31-2003 08:43 AM

» Photo Contest Winners

All times are GMT -4. The time now is 03:39 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2023, vBulletin Solutions, Inc.