What fish can discus live with?
Tankmates for Discus
Discus tank mates must also prefer soft acidic, very warm water, but at the same time must not be boisterous or aggressive. Cardinal tetras are popular, as are Ram dwarf cichlids. Catfish can be included as long as they are warm water tolerant and don’t grow larger than the discus.
Are discus fish hard to keep?
Discus fish are one of the most beautiful freshwater fish in the hobby, known for their spectacular colors and large, circular shape. However, they’re notorious for being extremely difficult to keep, with Internet forums often recommending strict practices like 100% water changes every day.
How many discus should be kept together?
3-5 discus should be doable in a 55gal aquarium as long as water changes are kept up with. A general rule you can follow is one discus per 10 gallons. Since these fish are tall, do not keep them in shallow tanks. The UNS 90U, 120P, and 120U are all high quality aquariums that would be great for discus!