Hey Daniel welcome! Do you kept fish now or are you starting from scratch? My suggestion is get a small tank (or 2) and start there. Start up a smaller tank and get your discus. Grow them out in the smaller tank while your setting up your main tank. If bought at the 2.5 size it will take a few months to grow them to 4-5”. Now you get the idea of how to kept discus. Plus you can use the smaller tank down the line for qt or growing out new fish. Me I’d suggest the 2 tank approach. A 45 to start with and a 75 to grow them out further once they reach 4”. Both of these would be bare bottom with daily 50% or better water changes for the 45 and every other day for the 75. With feeding at least 6 times a day. Lots to learn and ask lots of questions. First thing will be to find out what your tap water has in it. Ph,ammonia,nitrite,nitrate, kh and gh. So get an api master test kit and the kh/gh kit so you can start testing. Put your results here and we’ll get back to you .