Poorly Guppy

[Bashy]

This morning I have noticed 1 of my male guppys is sitting at the bottom of the tank and, which looks like, heavy breathing.
I've just fed them and he's not interested.
I done a test last night and results were:
Ammonia 0
Nitrite 0
Nitrate between 40-80
Was gonna do a water change tonight (as have work today)

He was fine last night
Bought 6 new fish on Sunday...3x balloon molly's (2x female, 1 male) and 3x platys (male).
Since Sunday the male swordtail has been hassling all the fish. He started to single out the balloon molly's (but all of them are getting grief), then last night I noticed him on the case of the new platy's.
I then read that you shouldn't mix swordtails and platy's because of aggression and interbreeding.
Am planning to take the platy's back to LFS tomorrow for exchange.

Do you think the guppy has been injured by the swordtail?
I can't see any damage to him, but not really sure what to look for re disease or injury.

Please help/advise

 

[Bashy]

Just popped home from work to check up on the little guppy and I can't find it anywhere, I suspect it's hiding behind a rock somewhere...what do I do?
Please help

 

[Skins]

Just popped home from work to check up on the little guppy and I can't find it anywhere, I suspect it's hiding behind a rock somewhere...what do I do?
Please help

Like you said this could well be down to aggression and your guppy is resting up some where. I have a green tiger barb that had been picked on within the group, for the last two/three weeks i always see him on his own. I have tried removing him but he won't let me any where near him, so not to stress him anymore i've let him be.

Keith.

 

[Bashy]

Just popped home from work to check up on the little guppy and I can't find it anywhere, I suspect it's hiding behind a rock somewhere...what do I do?
Please help

Like you said this could well be down to aggression and your guppy is resting up some where. I have a green tiger barb that had been picked on within the group, for the last two/three weeks i always see him on his own. I have tried removing him but he won't let me any where near him, so not to stress him anymore i've let him be.

Keith.

No, just got back from work and he is dead. Will wait until the toddlers in bed and fish him out and see if there is any sign as to why. But still not sure what to look for. Have only had the guppies a couple of weeks, so could it have had a problem when I bought it?
I hope I'm not gonna have more casualties...

 

[Skins]

It is quite possible he had problems before you bought him. I would be inclined to remove him from your tank sooner rather than later, just to be on the safe side.

Keith.

 

[Bashy]

Cheers skins. Took him out just after I read your post.
Just had a look and went over what to look for in book. No outward signs of infection or disease, so am just hoping it was bought with it or maybe was injured. Don;t want to wake up in the morning with another worry.
Gonna do a 40-50% water change now.

Thanks again