Getting a Mr. Aqua 12 long with these dimensions 35.4 x 8.3 x 9.4 Inch... would rather not run CO2 and will dose with Excel. Would the Ray 2 be too much light?
Yes it will be. On my other forum I have a friend with the same tank and a Ray2. You'll need CO2 and a nutrient regiment to keep from getting algae.