In a 30 gallon tank. I saw in a couple of places that they would be fine together so I bought two, and then I saw that the angels would eat them in another. How long does it take an angel to grow large enough to eat a guppy?
I have two guppies in my tank and I have since added angles (both fairly small) and there hasn't been any problems. We'll see how it goes when the angles are full grown.