I am here to say I am very dissapointed at my actions. Because of my failure to do proper research, an innocent oscar has died. I originally started fishkeeping to teach people how to properly keep fish. I live in Indonesia, and if I had to guess, close to 80% of fish kept are abused, mostly by being kept in small tanks. Like betta in cup, goldfish in 5 gal type abuse. You think the 1 inch per gallon rule of thumb is bad? we have one fish per liter. I knew stuff like that was fish abuse, but later on I guess I decided stuff like that was fine. My first ever mistake was buying that oscar. I personally feel that oscar would've been better off in an Indonesian 15 gallon. My own friend has 3 oscars in a 25-30 gallon, and one of my neighbors has arowanas, oscars, GT cichlids, and datnoids in a 100 gallon. Nowadays though, the information on Indonesian websites are more accurate, one I found said an oscar needs a minimum of 52 gallons. I agree that is most likely not large enough, but its better than what it would've been. That still doesn't rule out the possibility that my oscar would've lived in a 15 gallon. In fact, from what I have witnessed, I feel like the chances that an oscar would live in a 15 gal are higher than it living in a 50 gal. I assume it is because people don't like to do research. Back in the 80-90s, my dad and my grandfather kept fish. But because of lack of information, they didn't have large enough tanks. They kept a gigantic flowerhorn in a 30 gallon, goldfish and plecos in a 5 gallon, so and so fourth. I went to my relative's house last month, and one of their giant plecos are still there, still in a 5 gal. I assume most fishkeepers still keep fish like that because they would rather believe the information they got from years ago than from the internet. At the end of the day, life is always better than death, hence why I state my oscar would've been better in a 15 gallon then dead. I personally would live in a 10 foot hole in the ground then die, personal opinion though. All in all, I have made my worst decision in fishkeeping, that is to keep oscars without doing the proper research and having a good place for it to live. I understand why I bought the oscar, and I could have avoided buying it. I do not expect to be forgiven, for I know how large of a mistake this is. I am considering quitting the hobby, for I have learned how truly difficult it is. I'm keeping live animals, after all. You cannot expect caring for living things to be easy, yet that was what I thought starting this hobby.