Guppys With Bits Of Fin Missing :-(

[andyg81]

Came home tonight and 4 out of 5 guppys have got parts of there find missing

Water info
Ammonia 0.25
Nitrites 0.25
Nitrates 10

Done a 70% water change. Could it be the water or just them fighting amongst themselves ??

What should I do

 

[mattyeatsmatts]

other fish in tank?

 

[andyg81]

2 corydoras
3 platys
4 neons
3 red nose tetra
5 black widow tetra
1 bristle nose pleco
5 guppys in total
2 lemon tetra
2 harlequin tetra
1 electric blue ram
1 Siamese fighter
2 cherry barbs


Think that's it lol they have been together for 3 week and been fine but the guppys seem to be attacking each other and the Corys keep going for the pleco !

 

[JL94x4]

I had some guppies with Fighters, and the fighters slowly picked guppies off one by one, until i noticed that she was the cause, removed her, not had a problem since.

I treated the fish with Anti Bacterial treatment once i got the fighter out.

 

[Cazgar]

Odds are it's the fighter.
I'd remove it to another tank if you can, or divide part of the main tank

 

[andyg81]

He's fine he's hiding out the way and not going near the guppys it looks like there attacking each other

 

[andyg81]

dreading going home today, one of the guppys tails was pretty much half gone - and its one my females, so im guessing if it keeps getting attacked then it will be unable to swim cant understand why all of a sudden the other guppys would attack each other