Is it generally 1.5 to 1.8 meters? Our fish tank is more suitable. If it is bigger, you will find it a little troublesome. Fish farming needs regular maintenance and cleaning. It's hard to take care of when you're older. I've experienced it myself! 1.5m fish tank is not small, it looks quite bright, and its maintenance is much easier. I have a Nisshin 1.5m fish tank now, which is very good.