Ricca + Hair Algae

[Daz CPFC]

Im growing ricca in my nano on a rock and its getting covered in hair algae. Everything else in the tank is fine and i have quite a few fast growers. Whats the best way to deal with the hair algae on the ricca? Shall i take the rock out and remove the ricca?

The ricca seems to be growing fine so find it strange its covered in hair algae.

Thanks,
Darren