xSweeneyx

One of my mickey mouse platies looks like its about to die soon.
Its hardly doing anything, and it doesn't eat. She's breathing really hard, and she's usually hiding in the corner or laying on the floor.
She gave birth a couple of days ago (all the babies were dead), so maybe its stress or something? Anyone know what could be wrong?

I heard garlic can boost their immune system? How do I put it in?

TFA101

Test your water, but it sounds like there's been a temperature swing in the tank, such as cooler or warmer water placed in when performing water changes.

There's a specific vitamin formula called garlic guard, most LFS's have it.

0morrokh

Could you give us more info? What size tank, readings for: temp, ammonia, nitrite, nitrate, and what & how many fish? Is the tank cycled? Is she showing any symptoms of disease? Did the problem start right after she gave birth? How long have you had her?

COBettaCouple

Garlic Guard, Fish Protector and Vita-Chem might help her, along with daily water changes of 25% or so to keep the water extra clean.