Sorry for the click-bait! But so many threads start with something "wrong," I thought perhaps a little change of pace might be in order...
See below pic of my 190, looking from the end. Marineland 560 rated for 150gal, has been running 108 days since last cleaning. This is the only filtration on the tank. Note how you can make out the picture of my daughter on the wall, 15 feet away out the other side.
Filter media consists of the standard plastic bits that come with most canisters of this type, plus layers of polyfil, activated carbon and crushed coral. The water seems to be getting better the longer it goes.