Okay, I'm setting up my 30 gal heavily planted tank as a discus tank (Only planning on Three Discus). It has been up and running since Oct. and now its residence are 2 rummynose (the others died off within a week), 3 White Clouds, 3 apisto agasazzi, and 5 otos. I have a few sparkling (aka Pygmy) gouramis. would they be okay to put into the tank w/ discus? And what should my GH and KH be. Ive been told that GH should be around 3-5 dGH, but what about KH? My Other Levels are Ammonia 0, Nitirite 0, and Nitrate 0. I'm planning on doing water changes of atleast 40% 2x weekly. Let me know what you think