I got a nice and fat wild one from pet club. I know trying to keep a mandarin in a 30g is a no no but he stayed fat at the store after a couple of weeks and they had him in a holding tank which I doubt had much of a natural food source. He is now fat and healthy. Not sure what he's eating but...
I have the cone version and it works great for my 30g. Pulls out lots of skimmate and is pretty quiet. Good bang for your buck but not the best acrylic workmanship.
The reflectors are somewhat a parabolic shape with the bulb located approximately at the focus of the paraboloid. If you move the bulbs to the side it shifts the beam and scatters the light. Also having bulbs side by side you would lose one edge of the bulb from blockage and that portion of...