I had lost the remaining of my black phantoms and my two pearl Gouramis a few weeks ago... waited a few more days after wards. The only fish that survived were 4 corys, clown pleco, all my shrimp(4 amano and 2 bamboo), and 2 loaches. I gotten some more tetras 6 neons and 6 green neons(lost 2, they didn’t look good in the bag) and a small angel. I know angels can eat neons but I had them together before for years and never had issues. I am feeding them an anti parasite food just to be safe and so far haven’t had anymore deaths.
I will get a new heater when it gets cooler, since it’s hot no need for a heater right now. I may look into an Aquatop or a Marineland heater(had Marineland heaters in the past and never had issues with them)