I have a 122 gallon community tank. I have some tetras and loaches and wanted something big that pops if you know what I mean. Would my tank be ok for 2 discus? Are they very hardy? My water comes out of the tank around 7.8 and its hard, but no ammonia or nitrates are present in it. I have a sandy substrate and a few pieces of driftwood. I'm waiting for a month and then I wil add plants and co2 injection a month or so down the road. So would a few discus work or not? If not any other suggestions for a couple larger fish that will do ok in a community?