I have an 85 gallon tank. Dimensions 72"Lx15"Wx18"T. I have an inch and a half of gravel in the bottom, some fake plants, a couple flat sandstone rocks stacked to make a cave type thing, and an actual cave that was meant for a reptile terrarium (but matched my tank and was half the price of fish tank decor). I have two 36" Aqueon LED light fixtures and both have a white light bar, and a red and white light bar, as well as a night time blue. I am running 2 marineland penguin 350 filters. They are both rated for 350 gallons per hour each for a total of 700 g/h, and both have 4 slots for charcoal packs, although I only have two packs in each filter, and each unit has 2 biowheels (a total of 4). I have one filtration unit at each end of the tank (I figured it would give maximum filtration). I have a new world cichlid stock consisting of: two 6.5" Jack Dempsey (although one is in a seperate tank battling a fungal infection, but possibly will come back to the main tank soon), two 3 inch Midevils, two 2.5" Gold Saums, two 1.25" Mayans, three 1" Jaguar cichlids, and two small convicts 1.25" and 2". I realize it is potentially overstocked but most of the fish are small and they all get along for the most part believe it or not. I have plans for the fish when they are too big so don't whine about my future overstock please. Is my filtration good enough for now? How would it compare to a canister filter? I do atleast one 30% water change weekly. Also I have been hearing about powerheads and other stuff similar but don't know what its for. Could anybody please fill me in on some other gadgets that could benefit my tank?