And plus you have an angel in there with the 3 discus insted of with your other angel. And if your tank gets durty, when you go to clean it, take the decorations out, clean them off, clean the ENTIRE tank, add the new water, and add the decorations. And im not an idiot, i know what ammonia is! And, no i have never kept discus before, but i plan on it, so what i did to make sure i have ever bit of information on Discus health, diet, etc, i made a folder with over 100+ pages of information. I actually get all the info i can on fish that i have never had before i go out and get them!