My tank is 12" deep, i keep them in the very front so they are out the intense halides main light, basically just the tail end of their reach. the lights about 12" off the top of the tank. By direct, i mean they are not in the shade at all. Blastos for example IME like high indirect light. Meaning higher in the tank, but stuck to the side of a rock instead of the top.
I dont dose yet, I'm going to start dosing some FM stuff when Todd gets them in. I do however run a TON of carbon, and I feed them every other day with freezerbar cyclopeze & Mysis. I run a very low nutrient system (my skimmer is like taking dynamite to kill an ant) and that may or may not be a factor. But anyone who isn't running carbon start. Its made a night and day change for the good in my tank.
I dont dose yet, I'm going to start dosing some FM stuff when Todd gets them in. I do however run a TON of carbon, and I feed them every other day with freezerbar cyclopeze & Mysis. I run a very low nutrient system (my skimmer is like taking dynamite to kill an ant) and that may or may not be a factor. But anyone who isn't running carbon start. Its made a night and day change for the good in my tank.