I'm rather new to keeping aquariums.I had a few growing up but as soon as I turned 16 keeping fish was the last thing on my mind but now that im older im resurrecting my old hobby.I have a 20 gallon long that im currently setting up to get my feet wet but I also have a 75 gallon that I want to set up later this year however after doing alot of research I'm thinking of going bigger to the range of 125-250 gallons.Is the cost difference between a 75 gallon and say a 175 gallon going to be that much more expensive or is it going to be relatively close?Obviously filtration and lighting,etc.etc. is going to be more but is the overall maitenance and upkeep going to be that much harder?