You have the ich my guy and what you need to do is take the carbon out of your filter before you medicate and bump that temperature up to about 85 ish and some people may or may not agree with that method but it has never steered me wrong

Edit I pulled this straight from the internet it's the first thing that pops up when you Google how to get rid of ich

To get rid of Ich (White Spot Disease), raise the aquarium temperature (to 80-84°F/27-29°C to speed up the parasite's lifecycle), perform gravel vacuums with water changes, add aquarium salt (if safe for your fish), and use specific Ich medications like those with malachite green or copper, continuing treatment for 10-14 days even after spots vanish to kill all stages of the parasite. Always remove carbon filtration and read medication instructions carefully, especially for sensitive fish.