Why are discus so hard to keep?
Wild caught discus can be challenging to keep, due to their specialized water chemistry and dietary needs, however, most discus sold today are captive bred and are much easier to keep.
Can discus fish live in tap water?
The fish are bred in soft-water, but raised in German tap water and have been so since 1966. You can of course if you live in a soft water area or want to use RO water also keep them in soft water.
Do discus really need daily water changes?
Although all tropical fish aquariums require regular water changes, discus aquariums in specific need frequent water changes. For this reason, you should change your discus’ aquarium water at least once a week. Some people change 20 to 25% of their aquarium’s water two to three times a week.