Algae or mold

[gcarlin_818]

I have some og growing in rockwool and i just noticed today that there is alot of green forming on the top of the medium.... now shouild I worry or just let it grow i can take pics but i dont know how to upload please help....

 

[massproducer]

sounds like algae...Cover up the medium so that no light hits it and the algae will be unable to grow and will die. Algae is a plant and needs light to grow.
You could also use h202 if you are not using beneficials, the h202 will remove the algae quick.

 

[DomsChron]

I'd say just cover it up with something you cant see through, or that your lights can't penetrate. Then you don't have to worry about buying anything new.

 

[gcarlin_818]

thanks for the advice. im using a drip system so should I just cover up the cube with hydroton????I am going to get h2o2 for sure tommorow... also I noticed that on one of my plants the root was growing through the top of the medium...what should I do about that ?????