Excellent article Cees, it is a pity it was not ready for the article competition, pretend you won a prize and treat yourself to something from your own shop.
I was always on the look out for four-eyed fish when I was younger, I only wrote about that in an article recently, it is probably just as well I never found them as at the time I would not have had the knowledge or the equipment to set them up as well as you did.
The tidal feature to your tank was ingenious, when you mentioned the judges comment about the lack of it, I immediately thought how petty, how could you create that! But you did and it made a difference to the habitat. Congratulations of the achievements of that tanks and I look forward to hearing how you progress with the next one here in Ireland.
Daragh