Okay - so I hear it said about tank size and Emperors, and yes , likely an excuse to get another big tank here. I started my waterfall aquarium. A 90 Gallon, a 40, then a 20. Likely more than that. I need to do the math. the 90 is 27 and a half square. I just took these picts with the moon lights on. Tank lights off now, storming out. Powers flahing a bit. Anyway - at the store I've gone to when a kid, the owner John Mott at Advanced Aquariums told me that the Angel he had with color changing and being so small, would be fine in the 90 with just the small Snowflake Eel. The first chamber of the tanks is 90G. he said " look at the 125 with 3 fish. The Angel is in the tank with 3 fish, and do fine. The fish won't grow much larger. It's all about the fish size and what it will grow to. How many other fish will be introduced. Etc." So I think he felt a little bad battling my health issue ( just a decent guy), and told me an awesome price. Ugghh. Here I go leaving with this fih I am absolutely in love with. I look at the cube and the fishes size. It looks like enough space. I can still see the swirles leaving its body from the baby stage. This fish will grow, but is John right about its size being limited since it is small now and color change has taken place? Or do I set up a large tank for him used when he needs it - if so in 6 monbths or a year? I had heard many posts that said 125 was the lowest amount of water. If he is with just the eel , will this tank suffice or should I boost up a notch and get a larger one?