Thanks everyone! I think the heat worked
its been at 87f since this past Sunday and I haven't seen any spots in a few days. Everyone seems healthy and happy. The heat doesn't seem to be affecting the fish, even the Cory cats are being very active so I'm going to leave the heat up for awhile longer. maybe another week? And then gradually go back down slowly.
40g - 5 Blk. skirt tetras, 2 Serpae tetra, 1 Columbian Redfin Tetra, 4 Sterba Corys, 1 mated pair Electric Blue Rams
10g - 1 male Black Phantom Delta Guppy, 1 male Red Snakeskin Guppy, 4 female Blonde Guppies, 2 Guppy Fry
20g - fry tank (empty for now)