Her body and fins do not show any white spots yet she is rubbing herself against a plant as if it had ick. I have 4 other platies in the planted 20 gallon tank and she looks just as healthy as the rest of them. Ammonia and Nitrite is 0ppm and Nitrate is under 20 ppm. I added about 3 oz of java moss and few other plants and changed 10% of the water. Few hours later, I noticed that one of my female platy started rubbing against a plant. I also have a couple of shrimps and snails in the tank. I however do not have a quarantine tank but I will set up one soon though. She only rubs on the same plant(dracena sanderiana, which I added to the tank today)