This is spot on. Instead of quickly walking in and feeding etc. and promptly leaving, sit for a bit..it really does work. Every time I go into the fish room, after having done what was said, my fish come charging to the front and beg me to get off my a#& and feed them. Avoiding sudden movements and sounds with vibrations is imperative above all else. Regarding fish stress at cleaning time, I’d suggest one works from one side to the other, not random cleaning all over. While you’re cleaning/vacuuming on the right, the fish just swim to the left and hang out. After 5-10 minutes of such a session, I also do a very light feeding.
It seems our lives are very busy, always “on-the-go”. Spend time with your fish daily and, like the article said, the fish will be more trusting