Hey I just got a new fx5 on eBay! But it didn't come with filter media, let me know what you guys got in your fx5s! I have just the side pads, some air filters(from lowes) in top and middle and bio balls in bottom.
fx5 is badass, i got fluval pre filter and carbon on top, a polish pad with fluval bioballs in the middle, a polish pad and fluval bio balls in the last.
yeah id fill all the trays with bio media. i prefer eheim substrat pro because thats the stuf ive used for about a year now, and ive never changed or replaced it.