Adding fish to established, cycled tank - Tropical Fish Keeping - Aquarium fish care and resources
LinkBack Thread Tools
post #1 of 5 Old 07-10-2013, 07:15 PM Thread Starter
Question Adding fish to established, cycled tank

I want to add either Black neon tetras or Serpae tetras to a 29 gal tank. I have 7 fish in there now and have had them for several months. How many of either (up to six) should I add at once.
avraptorhal is offline  
Sponsored Links
post #2 of 5 Old 07-10-2013, 07:20 PM
jaysee's Avatar
What fish are in the 29?

My experience with serpae tetras is that they are very nippy fish. I had a school of 9.

Black neons, on the other hand, are wonderful fish. They occupy the top half of the tank, unlike the serpaes which occupy the lower half of the tank.

125 - BGK, chanchito cichlid, pictus cats, silver dollars, palmas bichir
125 - cichlids (severums, bolivian rams, chocolate), rainbows ( turquoise, red), loaches (angelicus, zebra, kuhli and horseface), plecos (BN, RL and clown), denison barbs, tiretrack eel, pearl gouramis, betta
90 - Congo tetras, african knife, upside down cats, spotted ctenopoma, kribensis, delhezzi bichir
2.5 - betta
jaysee is offline  
The Following User Says Thank You to jaysee For This Useful Post:
avraptorhal (07-11-2013)
post #3 of 5 Old 07-10-2013, 09:26 PM
JDM's Avatar
Ditto on the serpaes.

How many depends on the setup and how large the fish are. I just put 12 small silver tip tetras in a 25gallon. More plants lets you add more fish in an already established tank.


Total years fish keeping experience: 7 months, can't start counting in years for a while yet.

The shotgun approach to a planted tank with an LED fixture

Small scale nitrogen cycle with a jar, water and fish food; no substrate, filter etc
JDM is offline  
The Following User Says Thank You to JDM For This Useful Post:
avraptorhal (07-11-2013)
post #4 of 5 Old 07-11-2013, 01:44 AM Thread Starter
4 of the Platies are adult size. The other 2 are juveniles. I one adult size Serpae.

One of the adult platies (Sunburst/Sunset) used to chase the Mickey Mouse platy until I added the Black background to the back of the tank. BTW adding the black background seemed to change the behavior of all of the inhabitants, seemed to calm them all down.

I wanted to add the Serpaes to see if it would calm down the single Serpae occasional chasing anything in the tank. I haven't seen him nip anything and none of the others show any evidence of being nipped. If it would not slow down his chasing I would substitute an appropriate fish for the additional Serpaes.

My question was for the maximum number of fish I could add w/o causing a mini-cycle or other disturbance in the tank. My tank is heavily planted (see the gallery).
avraptorhal is offline  
post #5 of 5 Old 07-11-2013, 03:16 PM
New Member
We have 4 serpae tetras and we haven't had any problems with them being nippy, but this has just been our experience. But if you aren't wanting to try them then I think you should take back the one you have and get a shoal of other fish. I'm sure that is why it is more aggressive because it is by itself. If your tank is already cycled I would think you could add 4-5 tetras at one time and they would be okay.
ameliarose82 is offline  

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page

Similar Threads
Thread Thread Starter Forum Replies Last Post
Adding different substrate to established tank Perlumia Beginner Freshwater Aquarium 40 03-19-2013 12:35 PM
adding ammonia to established tank... Ridewithme38 Beginner Freshwater Aquarium 2 12-04-2011 08:16 PM
Established tank after cycled Cherokeewind Beginner Freshwater Aquarium 2 04-19-2010 11:30 AM
adding liverock to an established tank Dalybro Beginner Saltwater Aquariums 1 12-07-2009 10:21 PM
My tank is cycled! I'm adding fish 2mro!!!!! veganchick Freshwater and Tropical Fish 18 02-14-2009 12:39 PM

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 On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome