I've had a 36 gallon aquarium for about five years now and I've really loved taking care of it. One of my oldest fish, an angelfish, recently died and I'm trying to decide whether I should get more fish or not. I currently have one remaining large angel, three platys, two corys, and two gouramis. Can I add more fish or should I leave it at this? I know corys prefer schooling so I thought about getting more of those, but I really did love having the two angelfish and I'm considering raising another. Back when I had two adult angels, I was doing 30% water changes weekly. It's also heavily planted which helps soak up nitrates. Do you think I had it overstocked or not?