4 becomes 3

I am left with 3 mango trees. All the leaves on one of them turn brown and the whole plant was dead. I had made a mistake with these 4 plants when I repotted them. I did not drill holes in the plastic containers before I repot them resulting in overwatering and lots of fungus gnats in my living room. I quickly repotted the plants into good drainage soil and make sure the containers have enough holes for drainage. I have also added some crushed egg shells on the top layer of the soil. The fungus gnats has reduce a lot since then.

All the brown leaves in the other pot has dropped and the rest of the leave look ok except for one. I hope the rest of the plants will remain healthy.