Bad lightning
Recently I discovered that the light in the aquarium was very weak, the reason was that two of the tubes was not running at all.
I started to disassemble the fixture to find the problem and i actually found the problem, it was a bad solder inside the electronic ballast, I am quite happy i found it as it saves me a lot of money.
I think the problem has been there for a while, i have a bit of a problem with staghorn algae and i think this is because of the change intensity as this should be the only change in the aquarium.
