Looks sweet. So I assume you have essentially a 75g or 1.6wpg. That's not a lot, are you using window light as well? I'm no expert at this size, for my 10 and 20, I don't use filter media, just use the power filter to generate some current. It looks so heavily planted, I would give it a go from what I have read. Just make sure you have something to move the water a little, tank that size need to have some water movement to evenly distribute the temperature and move carbon, oxygen and nutrients in the water around the plants.