Whats Wrong with my Guppy?

[AmoretteCadenza]

He just lays at the bottoms of the tank. My other three guppies are fine What can I do? He's been like this for 3 days now...

 

[Mumma.of.two]

First thing you need to do is check the water parameters (ammonia, nitrite, nitrate and pH) then post the results. When a fish is acting odd its good to rule out any water problems. How long has the tank been running?

 

[AmoretteCadenza]

Well I got home from work about an hour and a half ago and found him dead at the bottom of the tank... I lost a guppy about 2 weeks ago, they were both from petsmart. It had a big bite mark on its side and this one today had one on its belly... There's a male molly and a pregnant female molly (which accidentally I got when I purchased the two guppies, I wanted a male). Is it possible that one of the mollies are killing my guppies? There's 3 left... Along with 3 cory cats. It's a 25 gallon tank and its been going for a couple months now. I did a water change when I got home and everything seems normal. I haven't tested my parameters yet. I stay on a schedule with my waters changes, all my reading stay normal...

 

[Mumma.of.two]

I'm sorry to hear that. I would keep an eye out for aggression. It could be the molly. Make sure to rule out any water problems.

 

[AmoretteCadenza]

Thanks for trying to help me. I'll keep a close eye on my tank tonight.