I used to have problems with the water chemistry of my aquarium, and fish used to die far too soon. I then started using Seachem products and have not looked back. Ammonia 0, nitrites 0, nitrates 20 ppm, ph 7.8, GH 18, KH 5. My fish never get any disease, and only die when they reach their normal life span, It is great to see my fish get to their normal size and all seem happy. I do weekly 25% water changes, and use Seachem Prime to dose the whole tank, not just the new water. I have a Juwel vision 180 tank, and clean the filter media every week in the water taken out the tank. I then dose the tank with Seachem Stability. I help keep the detriment down by using Seachem Pristine. My hobby is now an absolute pleasure.