Arowana are not groomed, They breeders are manipulating the buyers into buying something they are not. Same basis as injecting FH and discus with color hormones befor they go on the market. If I put a silver aro through a white treatment, then sell it as a high shine, in a couple weeks that shine will disappear. High shine aros can go for just as much as an Asain Aro and all you need to a good light and a styrofoam box.
You obviously have little or no experience with Asian arowana, or Asian aro breeders, as none of what you just stated is true. Myself, I've seen & handled enough Asian aros to know exactly what I am talking about when it comes to grooming techniques. As a matter of fact, I just helped unpack approx 30 pieces that were flown in from Singapore two nights ago.
Grooming a fish using WTT, or BTT, isn't anything even remotely close to injecting fish with hormones. That comment is about as absurd a thing as I have ever read on MFK.
Using WTT on an Asian aro xback does nothing more than show the future potential of the fish. In a high quality piece some of the shine will defintely fade when placed in a darker environment, but there is no "trickery" involved, and only an idjit will be fooled into buying something that it is not. In high quality pieces, from reputable farms, any loss of shine in a xback will always return as the fish matures. Grooming red aros in a tank with black background, and dark substrate, simply allows the fish to show its best potential, just as that fish would in the murky waters of its natural habitat. Unless of course you prefer a light tank, with white sand, and a washed out red fish.
Below are a list of things that one should look for in juvenile Asian aros, the amount of shine is but a small part of the equation.
Xbacks
1. How high is the shine?
2. Pearlies?
3. Bullet or spoony?
4. Gold on the head?
5. Color of gold.
6. Body shape. Is he a healthy weight or skinny.
7. How does it eat?
8. Tail shape. Does it have a large wide fan tail or smaller, uneven tail.
9. Swim posture. Does he swim around with fins against the body or flared out.
10. Base color of the scales.
11. How are the eyes? Drop eye? Clear and attentive. Are the eyes too big for his body?
12. Is the mouth even or does it have PLJ or overbite?
Reds
Same as above, but also look for
1. Is color cracking on the gills.
2. Is rim color coming in?
3. Base color. Usually blue or green.
4.Lips. Does he look like he wears red lipstick? This is a good indication.
5. Barbels should be long and even. Not as long in XB's but nonetheless important. They should be straight not curled. This can be due to poor water quality.
If you would like a more detailed explanation as to how or why Asian breeders use various grooming techniques on juvie Asian aros, go here & ask Koji.
http://www.monsterfishkeepers.com/forums/forumdisplay.php?f=215
To the OP, sorry for derailing your discussion, but I have a difficult time ignoring ignorance.