I’m thinking about buying a Red Sea Max Nano G2 XXL (53 Gallons), but I just don’t know if the price is worth it. Should I do Red Sea, or make a built with a Tideline AIO?
Honestly, it's up to you! You'll probably get a lot of people telling you not to buy a Red Sea due to issues they have had. I personally have a Red Sea Max Nano AIO and have never had any issues with mine.