I have a 125gal tank, relatively heavily stocked. 7bichirs ranging from 7in Palmas to 14in endli, 3 albino hecklii, ebjd, and 2 African brown knife fish. I have an fx4, and an aquaclear110, and pothos in the tank. Everything is fine, but the tank isn't clear as it used to be, in my fx4 I have all the standard media that it comes w in it. My question is should I replace the ceramic rings and lava rocks w something else? Put some ceramic rings at the bottom of the bucket? Add new sponges? If I remove the redtrays and just add more ceramic rings to the trays would that make my filter better? Any suggestions are appreciated. The filter is about 2 years old w regular maintenance cleaning every 3 months