Hey yall. I've had two angelfish for about 4 months now, and recently one of them has been declining in health and acting strangely. She is the smaller of the two (they are a mated pair). She used to be super active and stay close to the male, but lately she has been very lethargic and wont eat much, her breathing is quick so I added a large airstone to increase oxygen. I noticed small white dots and also small white patches on her. The male angel also has 2 small dots on his fins. I've been researching all day and am unsure what to treat for. I'm also nervous using medications since I have scaleless loaches and corydoras who are sensitive to meds. I dont have a quarantine tank and my research says if one fish has an illness it's likely all fish have it. I recently did a large water change but am hesitant to medicate. I'll post photos of how shes looking. PLEASE HELP! She is the angel with more black on her in the photos, the primarily gold one is the male.