I love Discus fish and use to raise them. They are very hardy if you get good healthy fish from the start. I had mine for 2yrs and even had 2 pair spawn. If you keep the heater on 90 degrees they will thrive even better. And water change water change wter change!!!!!! I changed out 5-10 gals every 3 days. Mine loved plants and drift wood. If u need help fill free to pm me or email me. I also wouldn't go any smaller then 55 gal.