LOL. Thats how it starts. I started with a 5.5 gallon, to a 10 gallon, then a 29, then a 55, then a 75, then a 125, then a 400 gallon goldfish pond, and now have them all running (and more) with a 1000g plus koi pond in the backyard... I like the insane amount of filtration you have on the 75 gallon tank! The water quality must be excellent. Time to stock up on more fishies to grow some more good bio bacteria on the expensive eheim bio material! 