my poor platy scarlette is not looking so good. about a week ago i dosed my tank to get rid of internal parasites and scarlette hasnt been the same since. she has been sulking on the bottom, not eating and today she looks as if her tail doesnt want to move so she can swim. part of me wants to euthanize her but im not sure how or what is the best way...but i also dont want to kill my fish and just let her pass naturally. when i saw her laying on the bottom i put my face close to the tank to see her better and she swam over and layed next to the glass. it was almost like she was asking me to put her out of her misery...i just dont know what to do. i feel like im suffering along with her...please help me!