i have ran into another problem. i am not do not know what type of filtration i need for a very large tank. and the size of the tank has been changed to a 7 1/2x12x7 approximately 4800 gall we have already factored in the cost of how much the wood and different kinds of paint would cost and how to fill it we just need to figure out what all well be required for a tank of this size. It is a saltwater tank btw I was looking at protean skimmers and the cheapest for this size was around 3900 is there any way around this such as a diy I have almost any tool I could need at my disposal to build something.