Swordtail Help!

[nanights98]

Hello,

I'm having a huge issue with swordtails. I have 6 swordtails. 1 of them gotten beatin up. Its back fin has bites and it had a bite mark on its body. I have another swordtail laying on the bottem of the tank laying side ways. It looks like its gapping for water. (Hard time breathing?)

 

[coralbandit]

Males can be very tough on each other..
How many of the 6 are males and what size is the tank?
Ideally you have one male ,but it sounds different...

 

[nanights98]

I have a 20 gallon tank. These are stil baby swordtails. I'm unable to tell you which are males or females.

3 have died this morning.

 

[idol1]

My male swordtails in the breeding pool no problem.

10 male swords even in my 125 gal plenty of space. They still would kill each other.

Now I have 1 male breeding sword in a 55 gal. Males seldom get along in a tank.

I don't have a problem when a female turns male.

For some reason the true male doesn't fight with the female turned male.

 

[toolman]

I have a 20 gallon tank. These are stil baby swordtails. I'm unable to tell you which are males or females.

3 have died this morning.

Ideally I'd recommend a bigger tank for a colony of swordtails, especially with more than 1 male.
As idol 1 was trying to say I believe, I have to be very careful keeping more than 1 male in my 75gallon heavily planted tank.

What are your water conditions, 3 deaths that close together is alarming. Seems like more than bullying.