Algae inside silicon worry-?

[Notsolostfish]

Iv had this infinia 190.5 waterbox for over a year now, no leaks no issues obviously my anxious self decided to do silicon inspection today, why i dont know?. But iv found this algae growing inside the front display glass bottom right corner. It looks bigger in the video thats what its. How bad is the situation?

 

[Reefing Madness]