Hey I am trying to figure out what stocking I should do in my 20 high. I have 6 neon tetras, 3 Amano Shrimp, and 1 Cory in there. I am not upping the Cory school because he is really old and all his other friends unfortunately passed of old age and really do not want more Cory's. So I am going to up the neon school but I want at least one more species with them. Feel free to give me any ideas you have. My tank is planted pH of 7.4-7.6. Ammonia 0 Nitrate 0 Nitrite 0. I also have black gravel. Here is a picture.