Danios or Golden Tetras nipping at Angelfish
I am a relatively new aquarist and am having trouble with nippy
<One of the commonest problems beginners have to deal with. Trust
me, we've all been there.>
I have a 21Gallon (tall) aquarium that has been established for 7
It has 2 Zebra Danios, 2 Longfin Rosie Danios, 1 Longfin White Danio, 3
Golden Tetras, a Glass Cat and a Plecostomus.
<Could really be any of the Danios or Tetras, to be honest.
You've made the classic mistake of not keeping enough of either
species. The Rosy Danios are, I assume, Danio roseus. The Zebras and
Albino Danios are both Danio rerio. Both of these have the potential to
be aggressive fish in groups smaller than 6, and honestly, I've
seen groups of six Danios withered down to just one male through
ceaseless aggression between the original members.
So the bigger the group, the better. Golden Tetras also need to be kept
in groups of 6. That's a standard rule of any schooling fish. But
this species, Hemigrammus rodwayi, isn't aggressive or known to be
nippy under most circumstances. My money would be on the
Two days ago I added a small Angelfish and every morning its caudal fin
becomes a little more frayed.
Naturally, I wish to relocate the aggressors to a 10 Gallon tank
(established for 1 year). I have searched many different websites and
have received much contradictory advice. I have also read many threads
on your site and, wonderfully informative as they are, all seem to
indicate that the Angelfish should be the one nipping at fins.
<Not really, no. Can't think why that's something you've
read here. Angels can be territorial, and adults are surprisingly
predatory. But they're not serious fin-nippers, except perhaps with
truly hopeless cases like Bettas that get nipped by anything!>
I am aware of the schooling factor and was told that Zebra and Longfin
Danios would happily school together.
<Yes. But three Danio rerio does not a school make!>
Perhaps this is not so? As for the Golden Tetras, I live in a remote
town with a limited LFS and I have never seen any more Golden Tetras
Perhaps they would school with a different type of Tetra?
I would very much like to keep my Angelfish healthy and stress free. I
look forward to any advice you may have.
Thank you very much,
<Hope this helps, Neale.>
Re: Danios or Golden Tetras nipping at Angelfish
Thank you Neale!
I will now pay closer attention to species... seems so logical now that
you've pointed it out!
<As with many things in life.>
I will relocate the Danio Rerio and, due to lack of tank space, will
look into trading the Danio Roseus for more Rerio and form a proper
Will also ask LFS if they can order more Golden Tetras.
<Wise. They're nice fish.>
Lesson learned! :)
Re: my misinterpretation of Angelfish being nippy... it's likely I
simply misunderstood what I read as my head does "swim" with
too much info at times!
Thank you for indulging a novice!