It’s a question that still remains unanswered as to whether discus fish prefer hard or soft water. Some breeder actually recommends soft water but there are advocates that insist that hard water is still the best. Let’s look at some examples given below based on my own experience.
Depending on which supplier the discus fish is obtained from and raised, check with the breeder to find out this important information. If you are getting from third party supplier and thus unable to directly contact the fish owner, then you can even conduct your own water hardness test using available test kits which you can easily buy from pet shops. Checking out this information is actually proves to be advantageous because if you know whether the discus is raised in hard or soft water, it will save the trouble for your pet to get acclimatize to new water all over again. If it’s moving from soft water to hard water, definitely your fish will feel the stress of changing to the new water environment.
The decision on whether to prepare your water in hard or soft water also depends on the age factor. Based on my own experience, young discus generally prefer hard water where it contains all the necessary ion and materials needed for growth and development. In the setup, they should grow faster compared to young discus fish raised in soft water. pH should also be monitored close to neutral region so that the fish will not be subjected to stress that will hinder their development. Be forewarned that young discus during this period has to be properly nurtured in order to satisfy every needs because once they miss the growing period, they will never get any larger anymore.
For adult discus, it is best that they should be kept in soft water instead. This is important during the time whereby breeding activity is expected and with soft water, this will stimulate the fish to spawn. Find out the hardness level, which is suitable for your discus fish and if determined that the water is too hard, adjust it to become softer by mixing RO water or you can use peat instead.
Find out about best tank condition to prepare for your discus fish.