Im thinking of making a home made sump tank for my new 75 g tank. There is currently an Eheim 2215 (handles 93g tank). Would it be worth the work and time to set up the home made sump, or just go out and buy an Emporer 400? I would only be saving about 20 bucks with the sump, but am still undecided. Any help or opinions would be great. Thanks, Andrew