Thanks for your comments and help.
Nice to see in here Portuguese friends! Thank you Miguel and João M for the Midas, they are gorgeus!
Soon I'll make a video of the construction of this tank - it was not a DIY! I only made de design of the struture and payed the fiberglass work, including the 3D background.
The light effect most of you enjoyed is made by just one 50W LED. Soon I'll show you better - the all layout - I promisse!
I asure you it takes only 15 minutes to make a 400L water change. It was all made so that the mantainance was easy.