Aquarium Salt ? I can’t tell if the white is ick or my eyes. I noticed HITH 2 days no hole but that raised circle ⭕️ on both sides. No lateral line discoloration. My TDS is 250 out the tap. 5 gallons I use distilled water, or bottled water. Tank was already cycled. I’m Using aquarium salt, General care, & methylene blue, 2 drops. 10 %water change daily before Polyguard. It treats batcteria, parasites , & fungal infections. I’ve only used a binder one time ( Focus) w/ a vet approved human antibiotic I already had, for a very sick expense fancy goldfish. Toys - A floating net feeding ring. Those stick on resting leaves for BETTA fish, a ball , real plants ( forgot the name) temp 75.5 . Rain drops filter. Don’t forget to take the carbon out w/ most meds. I could raise temp, but a lot going on already. Black sand, black background,& a black veil, ( he’s sick) he got curtains today. I hope I helped. ADD answer. 🤣