Thank you for the encourage words, Pals!
But as much as I take a look to these Praecoxs photos…and next to the fishes…
I see that they’re not enough perfect…

Actually, the fishes are more colorful, more shining…!
I told you about that my problem once in the thread of Giant Danyo, but nobody answer me…:-(
So, I’ll ask you again:
That are my usual setup: WB is on Auto . I’m shooting in AV-mode; the Exposure time is the max. – 1/200 sec., ISO 100 – 200;
and two external flashes above the tank (or the one of them is on tripod straight the tank).
When I’m closing the Aperture value to get a deep focus (what decreasing the surplus fishes shining also)
since F: 10 to F: 20, the color begins to desaturated …

:question:
What do you think - where I’m going wrong!?