My guppy wasnt eating and was getting very thin. I put her in a quarantine tank so she wouldnt infect the other fish, every ither fish is doing fine but she is pale, thin, and doesnt eat, she also is just lying on the bottom of the tank and sometimes she just floats on the top of the tank but is still alive. Please help, i dont know what to do and I want to know!!! 
These are some photos i took of her. Pleases tell me waht you think, PLEASE!!!

These are some photos i took of her. Pleases tell me waht you think, PLEASE!!!