um honestly i have one 180 gallon with a Fluval FX5 with the fluval filter pads, bio balls, Bio max, and 3 - 10 oz bags of chemi-pure for media and they seem to work well. you can buy a 12 pack of the 10 oz chemi pure for $65 at almost any mail order catalog. i remove one bag per month so each bag is in my filter for 3 months. For lighting i have the Coralife Lunar-Aqualight series. Big Als sells the 72" lights for about $450. i have 2 - 300 watt Fluval E series heaters (appx $55 a piece), they have digital settings not the knob that you have no clue where it is set. look into those they will warn you when water is 2 degrees above or below your set temperature with a flashing display. i have 2 power heads for aeration, but that's your preference.