I am almost completed with cycling my tank. I want to add a refugium to help control nitrates and phosphates. So when is the best time to add this to my system? I have a 10G tank that I am not using planning on adding the sump kit from amazon to it for minor filtration but mostly as a refugium. I'm worried that if i start it too soon then the chaeto could die off and cause way more issues that it will solve in the long run.