Discus Fish - Water Parameters & Filteration It is very important to know how & check your Aquarium water parameters regularly or weekly to keep your Discus fish alive & sustain for a long time. They need a PH of 6.0 to 7.0. I have been adding API PH down regularly to give them a better feeling. Eventually, I noticed that they can live and survive in PH 7.0 which is my local tap water. Thankfully, our local tap waters KH, PH, etc are all good. Hardness in water is not that much. Still I use Seachem Prime as a water conditioner. Consistency is the key. I do 25% water changes every two days and I can see how happy my Discus fishes get. They start bullying each other or playing maybe I guess. The rest story is in the Video. Please see, listen & understand. I may be wrong, but it is my personal experience in keeping these wonderful fishes & I believe they all are surviving now with my learning from all different sources over the net. SUBSCRIBE . LIKE . COMMENT For more videos like this https://youtu.be/sIs5PFF8SBw