Just ride it out! DO NOT TAKE IT OUT AND CLEAN IT or add anything to the water. It can prolong the cycling process. Just let it go through the process, and once your nitrates are at 0 or near 0 give it another week. In the mean time mix about 5-10 gallons of salt water and get the parameters correct. I leave mine sit for about 3-4 days for temperature and salt to completely mix, sometimes a week with a power head sitting inside. Then once the cycle is complete do a weekly water change of 5-10 gallons once a week for 3 weeks and that should take care of the water. Also using a power head to blow some of the stuff off the rock for the filter to collect can help as well. Just remember to clean your filter pads so your not just relocating dead stuff or your nitrates may spike. Do not add any water clearing chemicals or anything like that just let it work itself out. The key to the reef hobby is patience. And I struggle with this a lot. Good luck and keep us posted!