This is my old setup.
one side 55 watt pl with a screen of 50 cm bij 8 cm this runs 4 months without a skimmer on a 1100 liter system.
some pictures of my system (the fish don't like pictures I think)
It works butt I missed something it was the light because it was one sided there had to be 90 watts on it and not the 55 watt I had now.
That would not work with pl so now it is led I need.
A DIY project.