Platy Problem

[Amunet]

The 2 female platies in our 5 gallon tank have been acting strange ever since they've given birth.
One of them swims around still w/ the fry but she's lost color and her top fin always seems to be clamped. She still eats like there is no tomorrow, she's not bloated, still pooping and everything. We'll call her platy1.
The other one (platy2) gave birth around the same time as the other one, then popped out around 3 more fry a few weeks later, but now is hiding all day long. Whenever she has come out, there's nothing wrong with her physically. No clamped fins, can't tell if she's bloated since she's a balloon platy... nothing on her, etc etc.
The one time platy2 did come out when I was feeding, platy1 started doing this really weird thing. She started to do this really spazzy swim at platy2. It's hard to explain b/c I've never seen them do this before. It was just strange, like she was trying to be aggressive... but not. Platy2 ended up hiding again and platy1 swam off normally again.
I should mention that platy2 used to be the aggressor. She would chase around the other one all the time before she started to hide.

Just worried about these 2 fish. All of the fry are totally fine. Haven't lost a single one of them. Water readings are spot on in the tank. I just dunno what could be wrong w/ the mommas.

 

[LauraFrog]

Clamped fins can be internal bacteria or parasites but this usually causes the fish to stop eating. It's a generic sign of stress and can also mean your water quality is poor or that something in the environment, like an aggressive fish, is making her unhappy. The other fish could be pregnant and Platy1 could be attacking her because she wants to eat the fry. Eating competitors fry = more food for your own fry = better chance that your fry survive.

 

[chicklette]

What are your water parameters exactly? How often do you clean the tank? Clamped fins are a sign of poor water parameters or parasites. Have you added any new fish and how long have you had the platys for? How many fish are in the tank?

Sorry for so many questions but this is the only way we will get down to helping you out.