So I often dream of my ideal fish tank. I imagine a tank that attempts to forge a beautiful little window into the natural world. Cardinal tetras and rummynose tetras are spectacular tropical fish. The former for their electric red and blue and the latter for their tight schooling and fire engine red snouts.
Native to the black water tributaries of the Amazon, these fish are at home in low ph water tinted with the natural dark tannins of decaying leaves. I must state, however, that I don’t know how so many fish can safely live in this small of an aquarium, but I speculate that it must be through the daily or bi-daily changing of large amounts of water.
The large fish are Altum angelfish, the largest freshwater angelfish. As breeding occurs in the Amazon or Rio Negro the populations of tropical fish swell into the tens of millions during the wet-season, they are sustainably captured by native fishermen sold to aquarium hobbyists around the world. Since these fish experience incredibly high natural mortality rates in the wild, large quantities can be harvested without damaging the various species’ long term viability. (I must note, however, the fish in the video are a captive bred F1 generation).
Angelfish are hunters so I caution not to set up this aquarium at home unless you are prepared for the possibility of having your Angels pick off your cardinals and rummynose. I wouldn’t be comfortable with the possibility of my prized cardinals getting eaten, but perhaps there’s a trick to keep it from happening. If so, let me know, and I will keep dreaming of such a setup as this.