1 shot is of the pacman near the bottom- tank is 48x48x24.. the next shot is the pacman near the top of tank shaded by a large cap- which is better spot?
No acros like to be shaded. Some do better in higher or lower light but you never want one shaded. You can always start it low and move it up over time and see how it reacts. If it's brown move it up and if it bleaches move it down.