Here is another hidden secret revealed by Oliver Knott in his "ADA Training Days"-album over att pbase.com:
ADA Training Day's - Day 2 photo - Oliver Knott the aqua creator photos at pbase.com
After setup a diatomfilter is run until the water is crystal clear. Something for contest photoshoots.
Another trick: Make the photoshoot in the morning before the plants have started to pearl. This is a trick I personally don't like since I find non pearling tanks a bit dead, but what to do when this is de facto standard and how folks in general likes their tank pics..