marineland led help

[sepulvd85]

is there a way for me to control the blue led by it self because there is a switch on the unit it self to move to to white, blue or boh on the same time. there is only one power cord for the light

[lnevo]

Just on and off. As it's probably a weak light, I would suggest using both and then controlling it with a timer. I would consider replacing it or supplementing it depending on what you're trying to keep.