Are dark tanks preferred by Discus fish? Let's think about it, when inhabiting murky waters, and not clear surfaces, what would they have liked? Now, at this stage of their evolution in a controlled aquarium environment, where the maximum depth in open water barely exceeds 10 feet, you can probably say that these fish have been blah for some time. Yes, and the biological litmus of these fish is completely different from what we see in nature. Their natural environment is a tough place and these South American Origin fish have adapted well to it. So, answering the question as to whether or not Discus fish prefer dark tanks, the answer is yes. For the same purpose, one does not need to be a total physiologist to understand that a fish that is what lives in environments outlined above, wouldn

Question

I’ve observed that my discus fish are rather more hyperactive during the night. Is it the darkness that is preferred by them?

Answer 1

Although the discus fish require exposure to the sun for improved health, like other diurnal species they prefer relaxing environments towards twilight. This is why, just like night owls, the fish become very active and social when it is dark. It is therefore not unusual to find discus fish dancing after the hours.