i have been told so many different things i have a 45 gallon tank and currently have 1 x 30w t8 marine white, 1 x 30w normal t8, 1 x 15w marine blue t8 i leave the blue on constantly and turn the two whites off at night my shrooms and buttons seem to be fine but i aim to add an anenome in the near future do you think i need more light if so suggestions