What about a sump ? Or a trickle tower . From what I see they look pretty easy . And you can build it the way you want and put as much media and whatever media you want into it , and you can use a power head of whatever size you want . I have a magnum 350 pro and I plan on building a sump with a 35 gallon tank a 5 gallon bucket and a 320 gph power head , so total on my tank I'll have about 670 gph flowing through a 75 gallon tank per hour

it's like draining and refilling it 9 times in an hour lol . So I'm thinking that might be good , plus I plan on using bio balls and ceramic rings and other stuff , I think a sump might be the best way to go in your case !