Because I was too spontaneous and did not think before I purchased the wild Altums, I have had to move my Alenquer discus pair into this tank to move the Altums into my 60 gallon. A very bad case of not thinking something out well before acting. So, right now, until the Altums are of size that they can go into the 180 Gallon tank, this is an African Congo tank with a discus pair. The perfect answer would be that I can convince the hubby that I need a 75 gallon tank to put the African tetras in that I have in the 180 gallon and make the 30 gallon an African biotope as well, but with smaller African tetras. Im having to juggle fish right now between tanks because of my lack of planning.