how to get rid of algae on my rockwool medium? theres a slight bit of algae on the top of my rockwool i have it p[laced in clay pellets under a 600w air cooled lamp i noticed a green discoloration and want to get rid of it before it causes any problems. wat can i do i say this a lot but im a first time grower jus trying to get any advice i possibly can thanks city
