Desperate need help Angels

[Tazman12]

I have three Angels that have been doing very well over the last 10 months

Now all of a sudden they stay at the top corner of the tank.

Don't swim around much and look sick.

This has happened all of a sudden they were doing well last night.

Now they stay in the top back corner and don't come to the front when someone comes to the tank like they used to.

Please Help I fear I will loose my three Angels.

What could be wrong with them.

Thanks

 

[bugsy66]

Do you have ammonia problems that you know of? When was the last time you did a water change? What is your temp?

What size of tank are they in and what other fish are with them?

bugsy

 

[Tazman12]

all parameters are good

only small cories with them

in a 50 gallon tank

any idea's what may be wrong guys

 

[Tazman12]

they do seem to have a little whitish slime or paste on them they don't use all there fins to move around