.Hello I set up a qt tank due to an ich outbreak. My nitrates are >5ppm and I can’t get them down, i have done 50% water change and nothing, i just have a few pvc elbows. Should i add live rock to help with the bacteria? I am new to this whole qt thing. I had started dosing copper power slowly but i guess i have to start all over again since that big wc took place. I already had 2 fish loss and i believe was by of the high nitrites. Nitrates were also on the high side.