Hello. I recently added some new media in my 4 tray canister filter for my 75 gallon aquarium. I just had sponge in the first tray (bottom) followed by floss in the middle two trays and then carbon and floss in the top tray. Last week I added ceramic rings to the 2nd tray and bioballs to the third tray. I used the floss and placed on top of each new media to keep the beneficial bacteria in the filter. However, since the addition of this media, my water has been cloudy (it was crystal clear before) and now I have high Ammonia at 0.5 ppm. It was also low before I added the new media. My tank has been setup for 4 months and it has gone through a cycle when I started. Am I going through another cycle? My nitrite is 0 ppm and Nitrates are at 20 ppm. I'm concerned with the higher Ammonia and cloudy water now. I do weekly water changes of about 30 gallons. Thanks.