I have this platy, Mickey, who has been a little weedy for a long time. She never grew very much and spent a lot of time on the bottom, only coming up for food. I have checked for worms, clamped fins and the dreaded stringy white poo but couldn't really identify any of the usual symptoms, and she was still eating so I thought she was just a little runt. I did dose with melafix too. This has gone on for months, and she just seemed to carry on but for the last few days she has been worse. Her spine seems to be bent and she is struggling to swim up for food. I feel that she is suffering and I should really put her out of her misery. What do you think?