Hey i have just set up my tropical freshwater tank, after its has been sitting in the garage for 3 years. i have bought a new light, in the hope it will make my plants grow better. and it has come with 2 globes , 1 which is a purple colour and one which is more a white - yellow . i was wondering if they are meant to be switched on at different times of the day or not at the same time. any help would be appreciated.
thanks
thanks