Ok, I'm a beginner fish-keeper. I have an orange platy that I've had for maybe two months. I noticed she'd had a batch of babies so I took her out and put her in her own tank (with some of her own water added to new - and which I'd done for her when she'd had other batche and seemed fine). However, she seemed to develope a white area around her gills, almost shiny which was really noticeable as she is so bright orange. At that stage I was just using an oxygen block, no filter or anything. I've just moved her back with the babies (in their own breeding net in her tank) and have got a small filter going now and have included a guppie into the tank as well. Her 'white patch' seems to have lessened, but it is still there. And I've noticed that the 'whites' of her eyes are now red. Is my fish sick? With what? What do I do before I kill her unintentionally if she is? Help!!! Sorry, I'm not up on all the terminology as yet so my description mightn't be the best.