i left for florida a week ago when i noticed some white spots on my tetra. i came back and another tetra had one. now another tetra has one and my juvenile oscar has 2 spots. i dont have a heater or a filter for a quarantine tank, what do i do?? ive heard ich remover stains, so i dont want to do that. is there a non-staining way? btw the tetras are as big as the oscar. (Buenos Aires tetra)