The amount of pods in the sock are a small percentage of the total pods in the system. Assuming the pods are reproducing in the dt and fuge, you won't have any issues. I have a 120 and use a rollermat which is fine felt and my mandarin is fat and happy. I dont supplement pods at all either. I used to when I was seeding the tank, but it has been a year or so since my last addition. The polish from the felt sock is worth it. Just change them a couple times a week so it is an effective nutrient export. When i ran socks before getting the rollermat I opted not to shake out the pods as I didn't want to get the other nasties in the sock back in my tank.