My red platy has a white spot on her head. It's the size of the letter O so I dought it's ick. So whats wrong with her? Will it transmit to the other fish?
If it is ich yes it will spread but by the time you're seeing spots it's too late but you'll need to medicate the tank to kill it. Ich can only be killed in it's free swimming stage so what you'll need to do is turn the temp in your tank up to about 82* and as soon as you can go get ich meds and also what are the other fish in that tank and how big is it?
Ok well first I suggest you turn the temp up if you haven't already and if you could show us a pic? Also you need ich meds and you could add aquarium salt but I'm not sure with the pleco and fry.