the water isnt really green, like i said before its a cell phone picture and the lights arnt good, as for water changes its twice a week. i know i should have upgraded the tank a while ago, but im in the process of getting a new house and moving so building one at my old house would be a waste, since the size of the tank i need in gonna have to be built on location, also the pacu it about 10 inches had him 6 monthes.