I love the show. A lot of the show's criticism is unwarranted. What they don't show you is all the work that is put into doing the tanks properly. They edit out much of the "technical" stuff, as it's boring to the viewer (cycling, acclamation, details on fish care and filtering, ext.) . I read an interview some time back with these guys. Most of the time they don't stock the tanks themselves, just build them (as their business is to primarily manufacture acrylic tanks).
What you see on your TV is an extremely condensed version of all the work that goes into making, stocking and keeping those aquariums. Also, there is no such thing as a true "reality" show. Many things are done for dramatic effect. This show, and all other reality shows (without exception), are all really just improvisation mixed with some scripted elements with a predetermined begining-middle-end.
Enjoy it for what it is with the knowledge that what you see isn't all there is too it. In all due respect, amateur hobbyists criticizing professionals is like a high school basketball player criticizing LeBron James.
I do wish more fish keeping facts were incorporated into the show, but I do understand why it isn't. This isn't an educational program, it's an entertainment program. I say enjoy the show, the tanks, the fish, the interactions and leave it at that. Or simply don't watch.
Here is an good article on the show that I think is an even-handed opinion/review. A "must read" for the shows critics.